Ronny Knut

First experiments with ultrashort, circularly polarized soft x-ray pulses at FLASH2

Marotzke, S.; Gupta, D.; Wang, R. -P; Pavelka, Martin et al.

Part of Structural Dynamics, 2025

• DOI for First experiments with ultrashort, circularly polarized soft x-ray pulses at FLASH2
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Femtosecond charge and spin dynamics in a Co₅₀Pt₅₀ alloy

Pavelka, Martin; Marotzke, Simon; Wang, Ru-Pan; Elhanoty, Mohamed F. et al.

Part of Structural Dynamics, 2025

• DOI for Femtosecond charge and spin dynamics in a Co₅₀Pt₅₀ alloy
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Evidence of an exchange-based origin of demagnetization from the fluence dependent delay of Ni in a disordered Fe_0.5⁢Ni_0.5 alloy

Jana, Somnath; Knut, Ronny; Singh, Puloma; Yao, Kelvin et al.

Part of Physical Review B, 2025

• DOI for Evidence of an exchange-based origin of demagnetization from the fluence dependent delay of Ni in a disordered Fe_0.5⁢Ni_0.5 alloy
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Elemental asymmetries of spin and electron dynamics in an insulating ferrimagnet

Saha, S.; Knut, Ronny; Malik, R. S.; Jatkar, K. et al.

Part of Applied Physics Letters, 2025

• DOI for Elemental asymmetries of spin and electron dynamics in an insulating ferrimagnet

Near-surface electronic structure in strained Ni-ferrite films: An x-ray absorption spectroscopy study

Saha, S.; Knut, Ronny; Gupta, A.; Radu, F. et al.

Part of Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films, 2024

• DOI for Near-surface electronic structure in strained Ni-ferrite films: An x-ray absorption spectroscopy study
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First experiments with ultrashort, circularly polarized soft x-ray pulses at FLASH2

Marotzke, S.; Gupta, D.; Wang, R. -P; Pavelka, Martin et al.

Part of Structural Dynamics, 2025

• DOI for First experiments with ultrashort, circularly polarized soft x-ray pulses at FLASH2
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Femtosecond charge and spin dynamics in a Co₅₀Pt₅₀ alloy

Pavelka, Martin; Marotzke, Simon; Wang, Ru-Pan; Elhanoty, Mohamed F. et al.

Part of Structural Dynamics, 2025

• DOI for Femtosecond charge and spin dynamics in a Co₅₀Pt₅₀ alloy
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Evidence of an exchange-based origin of demagnetization from the fluence dependent delay of Ni in a disordered Fe_0.5⁢Ni_0.5 alloy

Jana, Somnath; Knut, Ronny; Singh, Puloma; Yao, Kelvin et al.

Part of Physical Review B, 2025

• DOI for Evidence of an exchange-based origin of demagnetization from the fluence dependent delay of Ni in a disordered Fe_0.5⁢Ni_0.5 alloy
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Elemental asymmetries of spin and electron dynamics in an insulating ferrimagnet

Saha, S.; Knut, Ronny; Malik, R. S.; Jatkar, K. et al.

Part of Applied Physics Letters, 2025

• DOI for Elemental asymmetries of spin and electron dynamics in an insulating ferrimagnet

Near-surface electronic structure in strained Ni-ferrite films: An x-ray absorption spectroscopy study

Saha, S.; Knut, Ronny; Gupta, A.; Radu, F. et al.

Part of Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films, 2024

• DOI for Near-surface electronic structure in strained Ni-ferrite films: An x-ray absorption spectroscopy study
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Atom-specific magnon driven ultrafast spin dynamics in Fe_1-xNi_x alloys

Jana, Somnath; Knut, Ronny; Delczeg-Czirjak, Erna Krisztina; Malik, Rameez Saeed et al.

Part of Physical Review B, 2023

• DOI for Atom-specific magnon driven ultrafast spin dynamics in Fe_1-xNi_x alloys
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Element-resolved evidence of superdiffusive spin current arising from ultrafast demagnetization process

Gupta, Rahul; Cosco, F.; Malik, Rameez Saeed; Chen, Xin et al.

Part of Physical Review B, 2023

• DOI for Element-resolved evidence of superdiffusive spin current arising from ultrafast demagnetization process
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Atom-specific magnon-driven ultrafast spin dynamics in Fe1-xNix alloys

Jana, Somnath; Knut, Ronny; Delczeg-Czirjak, Erna Krisztina; Malik, Rameez Saeed et al.

Part of Physical Review B, 2023

• DOI for Atom-specific magnon-driven ultrafast spin dynamics in Fe1-xNix alloys
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Observation of coherently coupled cation spin dynamics in an insulating ferrimagnetic oxide

Klewe, C.; Shafer, P.; Shoup, J. E.; Kons, C. et al.

Part of Applied Physics Letters, 2023

• DOI for Observation of coherently coupled cation spin dynamics in an insulating ferrimagnetic oxide

Element-selective ultrafast magnetization dynamics of hybrid Stoner-Heisenberg magnets

Elhanoty, Mohamed F.; Eriksson, Olle; Knut, Ronny; Karis, Olof et al.

Part of Physical Review B, 2022

• DOI for Element-selective ultrafast magnetization dynamics of hybrid Stoner-Heisenberg magnets
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Ultrafast manipulation of the NiO antiferromagnetic order via sub-gap optical excitation

Wang, Xiaocui; Engel, Robin Y.; Vaskivskyi, Igor; Turenne, Diego et al.

Part of Faraday discussions, p. 300-316, 2022

• DOI for Ultrafast manipulation of the NiO antiferromagnetic order via sub-gap optical excitation
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Experimental confirmation of the delayed Ni demagnetization in FeNi alloy

Jana, S.; Knut, Ronny; Muralidhar, S.; Malik, Rameez Saeed et al.

Part of Applied Physics Letters, 2022

• DOI for Experimental confirmation of the delayed Ni demagnetization in FeNi alloy
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Ultrafast modification of the electronic structure of a correlated insulator

Grånäs, Oscar; Vaskivskyi, I.; Wang, X.; Thunström, Patrik et al.

Part of Physical Review Research, 2022

• DOI for Ultrafast modification of the electronic structure of a correlated insulator
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Quantum watch and its intrinsic proof of accuracy

Berholts, Marta; Knut, Ronny; Stefanuik, Robert; Wikmark, Hampus et al.

Part of Physical Review Research, 2022

• DOI for Quantum watch and its intrinsic proof of accuracy
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Element-Specific Magnetization Dynamics in Co-Pt Alloys Induced by Strong Optical Excitation

Vaskivskyi, Igor; Malik, Rameez Saeed; Salemi, Leandro; Turenne, Diego et al.

Part of The Journal of Physical Chemistry C, p. 11714-11721, 2021

• DOI for Element-Specific Magnetization Dynamics in Co-Pt Alloys Induced by Strong Optical Excitation
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Optical and extreme UV studies of spin dynamics in metallic and insulating ferrimagnets

Liu, H.; Knut, Ronny; Saha, Susmita; Malik, Rameez Saeed et al.

Part of Journal of Applied Physics, 2021

• DOI for Optical and extreme UV studies of spin dynamics in metallic and insulating ferrimagnets
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Perpendicular and In-Plane Hole Asymmetry in a Strained NiFe₂O₄ film

Knut, Ronny; Malik, Rameez Saeed; Kons, C.; Shoup, J. et al.

Part of Journal of Physics, 2021

• DOI for Perpendicular and In-Plane Hole Asymmetry in a Strained NiFe₂O₄ film

Quantifying Spin-Mixed States in Ferromagnets

Shaw, Justin M.; Knut, Ronny; Armstrong, Abigail; Bhandary, Sumanta et al.

Part of Physical Review Letters, 2021

• DOI for Quantifying Spin-Mixed States in Ferromagnets

Ultrafast magnetization dynamics in the half-metallic Heusler alloy Co2FeAl

Malik, Rameez Saeed; Delczeg-Czirjak, Erna Krisztina; Knut, Ronny; Thonig, D. et al.

Part of Physical Review B, 2021

• DOI for Ultrafast magnetization dynamics in the half-metallic Heusler alloy Co2FeAl

Analysis of the linear relationship between asymmetry and magnetic moment at the M edge of 3d transition metals

Jana, Somnath; Malik, Rameez S.; Kvashnin, Yaroslav O.; Locht, Inka L. M. et al.

Part of Physical Review Research, 2020

• DOI for Analysis of the linear relationship between asymmetry and magnetic moment at the M edge of 3d transition metals
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Developments and enhancements to the HELIOS pump probe system

Stefanuik, Robert; Knut, Ronny; Jana, Somnath; Terschlüsen, Joachim A. et al.

Part of Journal of Electron Spectroscopy and Related Phenomena, p. 33-37, 2018

• DOI for Developments and enhancements to the HELIOS pump probe system

Investigation of the spectral properties and magnetism of BiFeO3 by dynamical mean-field theory

Paul, Souvik; Iusan, Diana; Thunström, Patrik; Kvashnin, Yaroslav et al.

Part of Physical Review B, 2018

• DOI for Investigation of the spectral properties and magnetism of BiFeO3 by dynamical mean-field theory

A setup for element specific magnetization dynamics using the transverse magneto-optic Kerr effect in the energy range of 30-72 eV

Jana, Somnath; Terschlüsen, Joachim A.; Stefanuik, Robert; Plogmaker, Stefan et al.

Part of Review of Scientific Instruments, 2017

• DOI for A setup for element specific magnetization dynamics using the transverse magneto-optic Kerr effect in the energy range of 30-72 eV

Tomographic reconstruction of circularly polarized high-harmonic fields: 3D attosecond metrology.

Chen, Cong; Tao, Zhensheng; Hernández-García, Carlos; Matyba, Piotr et al.

Part of Science Advances, 2016

• DOI for Tomographic reconstruction of circularly polarized high-harmonic fields: 3D attosecond metrology.

The valence band electronic structure of rhombohedral-like and tetragonal-like BiFeO3 thin films from hard X-ray photoelectron spectroscopy and first-principles theory

Mazumdar, Dipanjan; Knut, Ronny; Thöle, F.; Gorgoi, M. et al.

Part of Journal of Electron Spectroscopy and Related Phenomena, p. 63-66, 2016

• DOI for The valence band electronic structure of rhombohedral-like and tetragonal-like BiFeO3 thin films from hard X-ray photoelectron spectroscopy and first-principles theory

Photoinduced reduction of surface states in Fe:ZnO

Knut, Ronny; Lagerqvist, Ulrika; Palmgren, Pål; Pal, P. et al.

Part of Journal of Chemical Physics, 2015

• DOI for Photoinduced reduction of surface states in Fe:ZnO

Role of boron diffusion in CoFeB/MgO magnetic tunnel junctions

Mukherjee, S.; Knut, Ronny; Mohseni, S. M.; Anh Nguyen, T. N. et al.

Part of Physical Review B. Condensed Matter and Materials Physics, 2015

• DOI for Role of boron diffusion in CoFeB/MgO magnetic tunnel junctions
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Generation of bright phase-matched circularly-polarized extreme ultraviolet high harmonics

Kfir, Ofer; Grychtol, Patrik; Turgut, Emrah; Knut, Ronny et al.

Part of Nature Photonics, p. 99-105, 2015

Non-collinear generation of angularly isolated circularly polarized high harmonics

Hickstein, Daniel D.; Dollar, Franklin J.; Grychtol, Patrik; Ellis, Jennifer L. et al.

Part of Nature Photonics, p. 743-750, 2015

Strong-field ionization with two-color circularly polarized laser fields

Mancuso, Christopher A.; Hickstein, Daniel D.; Grychtol, Patrik; Knut, Ronny et al.

Part of Physical Review A, 2015

Reactive ZnO/Ti/ZnO interfaces studied by hard x-ray photoelectron spectroscopy

Knut, Ronny; Lindblad, Rebecka; Grachev, Sergey; Faou, Jean-Yvon et al.

Part of Journal of Applied Physics, 2014

• DOI for Reactive ZnO/Ti/ZnO interfaces studied by hard x-ray photoelectron spectroscopy

Depth-Dependent Magnetization Profiles of Hybrid Exchange Springs

Nguyen, T. N. Anh; Knut, Ronny; Fallahi, V.; Chung, S. et al.

Part of Physical Review Applied, 2014

High energy photoelectron spectroscopy in basic and applied science: Bulk and interface electronic structure

Knut, Ronny; Lindblad, Rebecka; Gorgoi, Mihaela; Rensmo, Håkan et al.

Part of Journal of Electron Spectroscopy and Related Phenomena, p. 278-288, 2013

• DOI for High energy photoelectron spectroscopy in basic and applied science: Bulk and interface electronic structure

Detection of microwave phase variation in nanometre-scale magnetic heterostructures

Bailey, W. E.; Cheng, C.; Knut, Ronny; Karis, Olof et al.

Part of Nature Communications, p. 2025, 2013

• DOI for Detection of microwave phase variation in nanometre-scale magnetic heterostructures

Interface characterization of Co2MnGe/Rh2CuSn Heusler multilayers

Knut, Ronny; Svedlindh, Peter; Mryasov, Oleg; Gunnarsson, Klas et al.

Part of Physical Review B. Condensed Matter and Materials Physics, p. 134407, 2013

• DOI for Interface characterization of Co2MnGe/Rh2CuSn Heusler multilayers

Exploring the accessible frequency range of phase-resolved ferromagnetic resonance detected with x-rays

Warnicke, P.; Knut, Ronny; Wahlstrom, E.; Karis, Olof et al.

Part of Journal of Applied Physics, 2013

• DOI for Exploring the accessible frequency range of phase-resolved ferromagnetic resonance detected with x-rays

High energy photoelectron spectroscopy in basic and applied science: Bulk and interface electronic structure

Knut, Ronny; Lindblad, Rebecka; Gorgoi, Mihaela; Rensmo, Hakan et al.

Part of Journal of Electron Spectroscopy and Related Phenomena, p. 278-288, 2013

• DOI for High energy photoelectron spectroscopy in basic and applied science: Bulk and interface electronic structure

Near-Room-Temperature Colossal Magnetodielectricity and Multiglass Properties in Partially Disordered La₂NiMnO₆

Choudhury, D.; Mandal, P.; Mathieu, Roland; Hazarika, A. et al.

Part of Physical Review Letters, p. 127201, 2012

• DOI for Near-Room-Temperature Colossal Magnetodielectricity and Multiglass Properties in Partially Disordered La₂NiMnO₆

Annealing effects on structural and magnetic properties of Co implanted ZnO single crystals

Wikberg, J Magnus; Knut, Ronny; Audren, A; Ottosson, Mikael et al.

Part of Journal of Applied Physics, 2011

• DOI for Annealing effects on structural and magnetic properties of Co implanted ZnO single crystals

Magnetocrystalline anisotropy and uniaxiality of MnAs/GaAs(100) films

Wikberg, J Magnus; Knut, Ronny; Bhandary, Sumanta; Di Marco, Igor et al.

Part of Physical Review B. Condensed Matter and Materials Physics, 2011

• DOI for Magnetocrystalline anisotropy and uniaxiality of MnAs/GaAs(100) films

Magnetic and electronic characterization of highly Co-doped ZnO: An annealing study at the solubility limit

Knut, Ronny; Wikberg, J. Magnus; Lashgari, Koroush; Coleman, Victoria A. et al.

Part of Physical Review B. Condensed Matter and Materials Physics, 2010

• DOI for Magnetic and electronic characterization of highly Co-doped ZnO: An annealing study at the solubility limit

Atomic-scale chemical fluctuation in LaSrVMoO6, a proposed half-metallic antiferromagnet

Jana, Somnath; Singh, Vijay; Kaushik, S. D.; Meneghini, Carlo et al.

Part of Physical Review B. Condensed Matter and Materials Physics, 2010

• DOI for Atomic-scale chemical fluctuation in LaSrVMoO6, a proposed half-metallic antiferromagnet

Investigation of interface properties of Ni/Cu multilayers by high kinetic energy photoelectron spectroscopy

Granroth, Sari; Knut, Ronny; Marcellini, Moreno; Andersson, Gabriella et al.

Part of Physical Review B. Condensed Matter and Materials Physics, 2009

• DOI for Investigation of interface properties of Ni/Cu multilayers by high kinetic energy photoelectron spectroscopy
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Electronic structure and chemical and magnetic interactions in ZnO doped with Co and Al: Experiments and ab initio density-functional calculations

Iusan, Diana; Knut, Ronny; Sanyal, Biplab; Karis, Olof et al.

Part of Physical Review B. Condensed Matter and Materials Physics, 2008

Electronic structure and chemical and magnetic interactions in ZnO doped with Co and Al: Experiments and ab initio density-functional calculations

Iusan, Diana; Knut, Ronny; Sanyal, Biplab; Karis, Olof et al.

Part of Physical Review B. Condensed Matter and Materials Physics, 2008

• DOI for Electronic structure and chemical and magnetic interactions in ZnO doped with Co and Al: Experiments and ab initio density-functional calculations

Defect Formation In Graphene Nanosheets By Acid Treatment: An X-Ray Absorption Spectroscopy And Density Functional Theory Study

Coleman, V. A.; Knut, Ronny; Karis, Olof; Grennberg, H. et al.

Part of Journal of Physics D, 2008

• DOI for Defect Formation In Graphene Nanosheets By Acid Treatment: An X-Ray Absorption Spectroscopy And Density Functional Theory Study

Inhomogeneity in Co Doped ZnO Diluted Magnetic Semiconductor

Sanyal, Biplab; Knut, Ronny; Grånäs, Oscar; Iusan, Diana et al.

Part of Journal of Applied Physics, 2008

• DOI for Inhomogeneity in Co Doped ZnO Diluted Magnetic Semiconductor

Electronic structure of Co doped ZnO: Theory and experiment

Sanyal, Biplab; Grånäs, Oscar; Knut, Ronny; Coleman, V. A et al.

Part of Journal of Applied Physics, 2008

• DOI for Electronic structure of Co doped ZnO: Theory and experiment

Ordering in diluted magnetic semiconductors: A magnetic percolation phenomenon (invited)

Eriksson, Olle; Iusan, Diana; Knut, Ronny; Sanyal, Biplab

Part of Journal of Applied Physics, 2007

• DOI for Ordering in diluted magnetic semiconductors: A magnetic percolation phenomenon (invited)

Understanding interface properties from high kinetic energy photoelectron spectroscopy and first principles theory

Granroth, Sari; Olovsson, Weine; Holmström, Erik; Knut, Ronny et al.

Part of Journal of Electron Spectroscopy and Related Phenomena, p. 80-93, 2011

• DOI for Understanding interface properties from high kinetic energy photoelectron spectroscopy and first principles theory

Spectroscopic investigations of electronic structure

Knut, Ronny; Karis, Olof

Part of Advanced Functional Materials, p. 45-70, Elsevier, 2012

• DOI for Spectroscopic investigations of electronic structure

New Materials for Spintronics: Electronic structure and magnetism

Knut, Ronny

2012

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Different fingerprints for the OISTR mechanism in the magnetic alloys experiments

Elhanoty, Mohamed F.; Eriksson, Olle; Knut, Ronny; Karis, Olof et al.

Part of ADVANCES IN ULTRAFAST CONDENSED PHASE PHYSICS III, 2022

• DOI for Different fingerprints for the OISTR mechanism in the magnetic alloys experiments

Ultrafast magnetization dynamics in magnetically frustrated NiFe₂O₄ ferrimagnet

Malik, Rameez Saeed; Knut, Ronny; Kvashnin, Yaroslav; Stefanuik, Robert et al.

Ultrafast dynamics in Fe₆₅Co₃₅ alloys: Effect of Re doping

Malik, Rameez Saeed; Knut, Ronny; Gupta, Rahul; Kumar, Ankit et al.

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Ultrafast magnetization dynamics in half-metallic Co₂FeAl Heusler alloy

Malik, Rameez Saeed; Delczeg-Czirjak, Erna Krisztina; Knut, Ronny; Vaskivskyi, Igor et al.

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Ultrafast Spin Dynamics of Ru in Ru/Fe₆₅Co₃₅/Ru heterostructures: Effect of Re doping

Gupta, Rahul; Malik, Rameez Saeed; Chen, Xin; Saha, Susmita et al.