Browsing by Author "Stamenov, Plamen"
Now showing items 21-29 of 29
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Single pulse all-optical toggle switching of magnetization without gadolinium in the ferrimagnet Mn2RuxGa
Stamenov, Plamen; Rode, Karsten; Atcheson, Gwenael (2020)Energy-efficient control of magnetization without the help of a magnetic field is a key goal of spintronics. Purely heat-induced single-pulse all-optical toggle switching has been demonstrated, but so far only in Gd-based ... -
Single-pulse all-optical partial switching in amorphous DyxCo1-xand TbxCo1-xwith random anisotropy
Coey, John; Stamenov, Plamen (2022)Repeated uniform switching of the magnetization of thin films of ferrimagnetic amorphous Gdx (FeCo)1 x in response to single fast laser pulses is well established. Here, we report unusual toggle switching in thin films ... -
Spin polarization and magnetotransport properties of systematically disordered Fe60Al40 thin films
Stamenov, Plamen (2021)We investigate the evolution of spin polarization, spontaneous Hall angle (SHA), saturation magnetization, and Curie temperature of B2-ordered Fe 60 Al 40 thin films under varying antisite disorder, induced by ... -
Spin transfer torque in Mn3Ga -based ferrimagnetic tunnel junctions from first principles
Stamenova, Maria; Stamenov, Plamen; Sanvito, Stefano (2021)We report on first-principles calculations of spin-transfer torque (STT) in epitaxial magnetic tunnel junctions (MTJs) based on ferrimagnetic tetragonal Mn3Ga electrodes, both as analyzer in a Fe/MgO stack, and also in an ... -
Stability of Mn2RuxGa-based multilayer stacks
Stamenov, Plamen; Coey, John; Rode, Karsten; Atcheson, Gwenael (2022)Perpendicular heterostructures based on a ferrimagnetic Mn2RuxGa (MRG) layer and a ferromagnetic Co/Pt multilayer were examined to understand the effects of different spacer layers (V, Mo, Hf, HfOx and TiN) on the interfaces ... -
Sub-picosecond exchange-relaxation in the compensated ferrimagnet Mn2RuxGa
Coey, John; Stamenov, Plamen; Rode, Karsten; Atcheson, Gwenael (2021)We study the demagnetization dynamics of the fully compensated half-metallic ferrimagnet Mn2RuxGa. While the two antiferromagnetically coupled sublattices are both composed of manganese, they exhibit different temperature ... -
Ultra-soft magnetic Co-Fe-B-Si-Nb amorphous alloys for high frequency power applications
Stamenov, Plamen; Ackland, Karl (2018)With the continuous shrinkage of the footprint of inductors and transformers in modern power supplies, higher flux, while still low-loss metallic replacements of traditional ferrite materials are becoming an intriguing ... -
Ultrafast Double Pulse All-Optical Reswitching of a Ferrimagnet
Coey, John; Stamenov, Plamen; Rode, Karsten; Atcheson, Gwenael (2021)All-optical reswitching has been investigated in the half-metallic Heusler ferrimagnet Mn2Ru0.9Ga, where Mn atoms occupy two inequivalent sites in the XA-type structure. The effect of a second 200 fs, 800 nm laser pulse ... -
The zero-moment half metal: How could it change spin electronics?
Coey, John; Rode, Karsten; Stamenov, Plamen; Atcheson, Gwenael (2016)The Heusler compound Mn2RuxGa (MRG) may well be the first compensated half metal. Here, the structural, magnetic and transport properties of thin films of MRG are discussed. There is evidence of half-metallicity up to x = ...