90 citations · 284 across the 13 of their papers we have counts for
13 papers
Observation of the orbital Nernst effect
Yuto Masuda, Takamasa Hirai, Daegeun Jo +5
The Nernst effect, which converts a temperature gradient into a transverse charge current, is fundamental to thermoelectrics. Its spin analogue, the spin Nernst effect, enables the…
Observation of the Nernst effect driven by longitudinal spin fluctuations
Fuyuki Ando, Hiroto Adachi, Hossein Sepehri-Amin +3
The Nernst effect, which converts a heat current into a charge current in the orthogonal direction, is generally classified into the ordinary effect due to an external magnetic fie…
Control of Covalent Bond Enables Efficient Magnetic Cooling
Xin Tang, Yoshio Miura, Noriki Terada +14
Magnetic cooling, harnessing the temperature change in matter when exposed to a magnetic field, presents an energy-efficient and climate-friendly alternative to traditional vapor-c…
Creation of flexible spin-caloritronic material with giant transverse thermoelectric conversion by nanostructure engineering
Ravi Gautam, Takamasa Hirai, Abdulkareem Alasli +4
Functional materials such as magnetic, thermoelectric, and battery materials have been revolutionized through nanostructure engineering. However, spin caloritronics, an advancing f…
Observation of nonvolatile magneto-thermal switching in superconductors
Hiroto Arima, Md. Riad Kasem, Hossein Sepehri-Amin +5
Applying a magnetic field to a solid changes its thermal-transport properties. Although such magneto-thermal-transport phenomena are usually small effects, giant magneto-thermal re…
Sm-Co-based amorphous alloy films for zero-field operation of transverse thermoelectric generation
Rajkumar Modak, Yuya Sakuraba, Takamasa Hirai +8
Transverse thermoelectric generation using magnetic materials is essential to develop active thermal engineering technologies, for which the improvements of not only the thermoelec…
Anisotropy induced spin re-orientation in chemically-modulated amorphous ferrimagnetic films
E. Kirk, C. Bull, S. Finizio +11
The ability to tune the competition between the in-plane and out-of-plane orientation of magnetization provides a means to construct thermal sensors with a sharp spin re-orientatio…
Observation of anomalous Ettingshausen effect and large transverse thermoelectric conductivity in permanent magnets
Asuka Miura, Hossein Sepehri-Amin, Keisuke Masuda +7
This study focuses on the potential of permanent magnets as thermoelectric converters. It is found that a SmCo-type magnet exhibits the large anomalous Ettingshausen effect (AE…
Coercivity enhancement of selective laser sintered NdFeB magnets by grain boundary infiltration
Christian Huber, Hossein Sepehri-Amin, Michael Goertler +4
Laser powder bed fusion is a well-established additive manufacturing method that can be used for the production of net-shaped Nd-Fe-B sintered magnets. However, low coercivity has…
Inducing out-of-plane precession of magnetization for microwave assisted magnetic recording using an oscillating polarizer in spin torque oscillator
W. Zhou, H. Sepehri-Amin, T. Taniguchi +5
We investigated the dynamics of a novel design of spin torque oscillator (STO) for microwave assisted magnetic recording. Using NiFe (NiFe) as the polarizer and Fe$_{…
Significant reduction of critical currents in MRAM designs using dual free layer with perpendicular and in-plane anisotropy
Dieter Suess, Christoph Vogler, Florian Bruckner +2
One essential feature in MRAM cells is the spin torque efficiency, which describes the ratio of the critical switching current to the energy barrier. Within this paper it is report…
Back hopping in spin-transfer-torque devices, possible origin and counter measures
Claas Abert, Hossein Sepehri-Amin, Florian Bruckner +3
The effect of undesirable high-frequency free-layer switching in magnetic multilayer systems, referred to as back hopping, is investigated by means of the spin-diffusion model. A p…
Field- and damping-like spin-transfer torque in magnetic multilayers
Claas Abert, Hossein Sepehri-Amin, Florian Bruckner +3
We investigate the spin-transfer torque in a magnetic multilayer structure by means of a spin-diffusion model. The torque in the considered system, consisting of two magnetic layer…