283 citations · 1k across the 28 of their papers we have counts for
28 papers
Magnetism of noncolinear amorphous DyCo3 and TbCo3 thin films
Zexiang Hu, Ajay Jha, Katarzyna Siewierska +4
The magnetization of amorphous DyCo3 and TbCo3 is studied by magnetometry, anomalous Hall effect and magneto-optic Kerr effect to understand the temperature-dependent magnetic stru…
Magnetism, transport and atomic structure of amorphous binary YxCo1-x alloys
Zexiang Hu, Jean Besbas, Katarzyna Siewierska +3
Sputtered thin films of binary YxCo1-x with 0 < x < 0.54 and thickness 15 nm are investigated to help understand the ferromagnetism of cobalt in amorphous rare-earth cobalt alloys.…
Quasi-static magnetization dynamics in a compensated ferrimagnetic half-metal -- MnRuGa
Ajay Jha, Simon Lenne, Gwenael Atcheson +3
Exploring anisotropy and diverse magnetization dynamics in specimens with vanishing magnetic moments presents a significant challenge using traditional magnetometry, as the low res…
Phonon and magnon jets above the critical current in nanowires with planar domain walls
Maria Stamenova, Plamen Stamenov, Tchavdar Todorov
We show through non-equilibrium non-adiabatic electron-spin-lattice simulations that above a critical current in magnetic atomic wires with a narrow domain wall (DW), a couple of a…
Ab initio comparison of spin-transport properties in MgO-spaced ferrimagnetic tunnel junctions based on MnGa and MnAl
Maria Stamenova, Plamen Stamenov, Nadjib Baadji
We report on first-principles spin-polarised quantum transport calculations (from NEGF+DFT) in MgO-spaced magnetic tunnel junctions (MTJs) based on two different Mn-based Heusler f…
CoRuVSi: A potential candidate for spin semimetal with promising spintronic and thermoelectric properties
Jadupati Nag, R. Venkatesh, Ajay Jha +4
Based on our experimental and theoretical studies, we report the identification of the quaternary Heusler alloy, CoRuVSi as a new member of the recently discovered spin semimetals…
Deformation and necking of liquid droplets in a magnetic field
Sruthy Poulose, Jennifer A. Quirke, Plamen Stamenov +2
Pendant droplets of water and paramagnetic solutions are studied in the presence of uniform and nonuniform magnetic fields produced by small permanent magnet arrays, both in static…
Au4Mn, a localized ferromagnet with strong spin-orbit coupling, long-range ferromagnetic exchange and high Curie temperature
Yangkun He, Zsolt Gercsi, Rui Zhang +8
Metallic Mn-based alloys with a nearest-neighbor Mn-Mn distance greater than 0.4 nm exhibit large, well-localized magnetic moments. Here we investigate the magnetism of tetragonal…
Multiplexable frequency retuning of MKID arrays using their non-linear kinetic inductance
Mario De Lucia, Eoin Baldwin, Gerhard Ulbricht +3
Microwave Kinetic Inductance Detector (MKID) arrays are currently being developed and deployed for astronomical applications in the visible and near infrared and for sub-millimetre…
Single-pulse all-optical switching in amorphous DyCo and TbCo
Zexiang Hu, Jean Besbas, Ross Smith +5
Repeated uniform switching of the magnetization of thin films of ferrimagnetic amorphous Gd(FeCo) in response to single fast laser pulses is well established. Here we…
Spin polarization and magnetotransport properties of systematically disordered thin films
Kiril Borisov, Jonathan Ehrler, Ciaran Fowley +8
We investigate the evolution of spin polarization, spontaneous Hall angle (SHA), saturation magnetization and Curie temperature of -ordered FeAl thin films under…
Stability of Mn2RuxGa-based Multilayer Stacks
Gwenael Atcheson, Katarzyna Siewierska, J. M. D. Coey +2
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…
Magnetic reversal and pinning in a perpendicular zero moment half-metal
Niclas Teichert, Gwenael Atcheson, Katarzyna Siewierska +6
Compensated ferrimagnets are promising materials for fast spintronic applications based on domain wall motion as they combine the favourable properties of ferromagnets and antiferr…
Ultra-fast Double Pulse All-Optical Re-switching of a Ferrimagnet
C. Banerjee, K. Rode, G. Atcheson +4
All-optical re-switching has been investigated in the half-metallic Heusler ferrimagnet Mn2Ru0.9Ga, where Mn atoms occupy two inequivalent sites in the XA-type structure. The effec…
Magnetic order and magneto-transport in half-metallic ferrimagnetic MnRuGa thin films
K. E. Siewierska, G. Atcheson, A. Jha +8
The ruthenium content of half-metallic MnRuGa thin films, with a biaxially-strained inverse Heusler structure, controls the ferrimagnetism that determines their magnetic an…
New highly-anisotropic Rh-based Heusler compound for magnetic recording
Yangkun He, Gerhard H. Fecher, Chenguang Fu +18
The development of high-density magnetic recording media is limited by the superparamagnetism in very small ferromagnetic crystals. Hard magnetic materials with strong perpendicula…
Spin transfer torque in MnGa-based ferrimagnetic tunnel junctions from first principles
Maria Stamenova, Plamen Stamenov, Farzad Mahfouzi +3
We report on first-principles calculations of spin-transfer torque (STT) in epitaxial magnetic tunnel junctions (MTJs) based on ferrimagnetic tetragonal MnGa electrodes, both a…
Sub-picosecond exchange-relaxation in the compensated ferrimagnet MnRuGa
G. Bonfiglio, K. Rode, G. Y. P. Atcheson +5
We study the demagnetization dynamics of the fully compensated half-metallic ferrimagnet MnRuGa. While the two antiferromagnetically coupled sublattices are both composed o…
Magnetization dynamics of the compensated ferrimagnet
G. Bonfiglio, K. Rode, K. Siewerska +7
Here we study both static and time-resolved dynamic magnetic properties of the compensated ferrimagnet from room temperature down to 10K, thus crossing the magnetic compensation te…
Single pulse all-optical toggle switching of magnetization without Gd: The example of Mn2RuxGa
C. Banerjee, N. Teichert, K. Siewierska +6
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…
Giant spin-orbit torque in a single ferrimagnetic metal layer
Simon Lenne, Yong-Chang Lau, Ajay Jha +6
Antiferromagnets and compensated ferrimagnets offer opportunities to investigate spin dynamics in the 'terahertz gap' because their resonance modes lie in the 0.3 THz to 3 THz rang…
Magnetocrystalline anisotropy and exchange probed by high-field anomalous Hall effect in fully-compensated half-metallic Mn2RuxGa thin films
Ciarán Fowley, Karsten Rode, Yong-Chang Lau +12
Magnetotransport is investigated in thin films of the half-metallic ferrimagnet MnRuGa in pulsed magnetic fields of up to 58 T. A non-vanishing Hall signal is observed over…
Antiferromagnetic Single-layer Spin-Orbit Torque Oscillators
Roberto E. Troncoso, Karsten Rode, Plamen Stamenov +2
We show how a charge current through a single antiferromagnetic layer can excite and control self-oscillations. Sustained oscillations with tunable amplitudes and frequencies are p…
Structure, site-specific magnetism and magneto-transport properties of epitaxial D0 MnFeGa thin films
Davide Betto, Yong-Chang Lau, Kiril Borisov +5
Ferrimagnetic MnFeGa thin films have been characterised by X-ray diffraction, SQUID magnetometry, X-ray absorption spectroscopy, X-ray magnetic ci…