Browsing by Author "Atcheson, Gwenael"
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Effect of insertion layer on electrode properties in magnetic tunnel junctions with a zero-moment half-metal Stamenov, Plamen; Rode, Karsten; Coey, John; Venkatesan, Munuswamy; Atcheson, Gwenael (2019)Due to its negligible spontaneous magnetization, high spin polarization and giant perpendicular magnetic anisotropy, Mn2RuxGa (MRG) is an ideal candidate as an oscillating layer in THz spin-transfertorque nano-oscillators. ...
Effective heat dissipation in an adiabatic near-field transducer for HAMR Jennings, Brian; Bello, Frank; Donegan, John; Mc Closkey, David; Hobbs, Richard; Atcheson, Gwenael (2018)To achieve a feasible heat-assisted magnetic recording (HAMR) system, a near-field transducer (NFT) is necessary to strongly focus the optical field to a lateral region measuring tens of nanometres ...
Exchange coupling of a perpendicular ferromagnet to a half-metallic compensated ferrimagnet via a thin hafnium interlayer Coey, John; Rode, Karsten; Atcheson, Gwenael (2017)
Magnetic order and magnetotransport in half-metallic ferrimagnetic MnyRuxGa thin films Coey, John; Stamenov, Plamen; Rode, Karsten; Atcheson, Gwenael (2021)The ruthenium content of half-metallic Mn2RuxGa thin films, with a biaxially strained inverse Heusler structure, controls the ferrimagnetism that determines their magnetic and electronic properties. An extensive study of ...
Magnetic reversal and pinning in a perpendicular zero-moment half-metal Venkatesan, Munuswamy; Coey, John; Stamenov, Plamen; Rode, Karsten; Atcheson, Gwenael (2021)Compensated ferrimagnets are promising materials for fast spintronic applications based on domain-wall motion as they combine the favorable properties of ferromagnets and antiferromagnets. They inherit from antiferromagnets ...
Magnetocrystalline anisotropy and exchange probed by high-field anomalous Hall effect in fully compensated half-metallic Mn2RuxGa thin films Coey, John; Stamenov, Plamen; Rode, Karsten; Atcheson, Gwenael (2018)Magnetotransport is investigated in thin films of the half-metallic ferrimagnet Mn2RuxGa in pulsed magnetic fields of up to 58 T. A nonvanishing Hall signal is observed over a broad temperature range, spanning the compensation ...
Oxygen Vacancy in WO<inf>3</inf> Film-based FET with Ionic Liquid Gating Stamenov, Plamen; Coey, John; Atcheson, Gwenael (2017)
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 ...
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 ...
Tunnelling magnetoresistance of the half-metallic compensated ferrimagnet Mn2RuxGa Coey, John; Rode, Karsten; Atcheson, Gwenael (2016)
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 = ...