531 citations · 1.1k across the 14 of their papers we have counts for
14 papers
Observation of Coherently Coupled Cation Spin Dynamics in an Insulating Ferrimagnetic Oxide
C. Klewe, P. Shafer, J. E. Shoup +11
Many technologically useful magnetic oxides are ferrimagnetic insulators, which consist of chemically distinct cations. Here, we examine the spin dynamics of different magnetic cat…
Element resolved evidence of superdiffusive terahertz spin current arising from ultrafast demagnetization process
R. Gupta, F. Cosco, R. S. Malik +13
Using element-specific measurements of the ultrafast demagnetization of Ru/FeCo heterostructures, we show that Ru can exhibit a significant magnetic contrast (3% asym…
Ultrafast manipulation of the NiO antiferromagnetic order via sub-gap optical excitation
Xiaocui Wang, Robin Y. Engel, Igor Vaskivskyi +19
Wide-band-gap insulators such as NiO offer the exciting prospect of coherently manipulating electronic correlations with strong optical fields. Contrary to metals where rapid depha…
Element selective ultrafast magnetization dynamics of hybrid Stoner-Heisenberg magnets
Mohamed F. Elhanoty, Olle Eriksson, Ronny Knut +2
Stoner and Heisenberg excitations in magnetic materials are inherently different. The former involves an effective reduction of the exchange splitting, whereas the latter comprises…
Ultrafast modification of the electronic structure of a correlated insulator
O. Grånäs I. Vaskivskyi, X. Wang, P. Thunström +25
A non-trivial balance between Coulomb repulsion and kinematic effects determines the electronic structure of correlated electron materials. The use electromagnetic fields strong en…
Analysis of the linear relationship between asymmetry and magnetic moment at the M-edge of 3d transition metals
Somnath Jana, R. S. Malik, Yaroslav O. Kvashnin +11
The magneto-optical response of Fe and Ni during ultrafast demagnetization is studied experimentally and theoretically. We have performed pump-probe experiments in the transverse m…
Exchange dependent ultrafast magnetization dynamics in FeNi alloys
Somnath Jana, Ronny Knut, Erna K. Delczeg-Czirjak +13
Element specific ultrafast demagnetization was studied in FeNi alloys, covering the concentration range between . For all compositions, we observe a delay…
Inhomogeneous magnon scattering during ultrafast demagnetization
R. Knut, E. K. Delczeg-Czirjak, S. Jana +20
NiFe (Py) and Py alloyed with Cu exhibit intriguing ultrafast demagnetization behavior, where the Ni magnetic moment shows a delayed response relative to the Fe, an…
Localization of Fe d-states in Ni-Fe-Cu alloys and implications for ultrafast demagnetization
Ronny Knut, Erna K. Delczeg-Czirjak, Justin M. Shaw +11
NiFe (Py) and Py-Cu exhibit intriguing ultrafast demagnetization behavior, where the Ni magnetic moment shows a delayed response relative to the Fe [S. Mathias et al.…
Generation of phase-matched circularly-polarized extreme ultraviolet high harmonics for magnetic circular dichroism spectroscopy
Ofer Kfir, Patrik Grychtol, Emrah Turgut +10
Circularly-polarized extreme UV and X-ray radiation provides valuable access to the structural, electronic and magnetic properties of materials. To date, this capability was availa…
Interface characterization of Co2MnGe/Rh2CuSn Heusler multilayers
Ronny Knut, Peter Svedlindh, Klas Gunnarsson +10
All-Heusler multilayer structures have been investigated by means of high kinetic x-ray photoelectron spectroscopy and x-ray magnetic circular dichroism, aiming to address the amou…
Near room-temperature colossal magnetodielectricity and multiglass properties in partially-disordered La2NiMnO6
D. Choudhury, P. Mandal, R. Mathieu +8
We report magnetic, dielectric and magnetodielectric responses of pure monoclinic bulk phase of partially-disordered La2NiMnO6, exhibiting a spectrum of unusual properties and esta…
Atomic scale chemical fluctuation in LaSrVMoO6: A proposed halfmetallic antiferromagnet
Somnath Jana, Vijay Singh, S. D. Kaushik +7
Half metallic antiferromagnets (HMAFM) have been proposed theoretically long ago but have not been realized experimentally yet. Recently, a double perovskite compound, LaSrVMoO6, h…
Magnetocrystalline anisotropy and uniaxiality of MnAs/GaAs(100) films
J. Magnus Wikberg, Ronny Knut, Sumanta Bhandary +9
We present an investigation of the magnetic behavior of epitaxial MnAs films grown on GaAs(100). We address the dependence of the magnetic moment, ferromagnetic transition temperat…