28 citations · 114 across the 14 of their papers we have counts for
15 papers
High-Efficiency and Large Supercurrent Rectification with Superconducting Coil
Takumi Ichikawa, Daisuke Takegami, Gen Nishijima +8
Superconducting diodes (SDs) are devices that rectify supercurrent through the difference in the superconducting critical current (Ic) between forward and reverse current direction…
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…
Realizing record-high transverse thermoelectric figure of merit at room temperature in artificially tilted multilayers based on high power factor NiFe alloy
Yebin Lee, Fuyuki Ando, Takamasa Hirai +3
Transverse thermoelectric conversion using artificially tilted multilayers (ATMLs) offers a versatile device architecture that circumvents the structural limitations of conventiona…
Observation of giant nonvolatile magneto-thermal switching in superconductor-ferromagnet hybrids
Yui Sakamoto, Fuyuki Ando, Keigo Ito +6
Magneto-thermal switch is a crucial thermal component which enables heat transfer control by the application of an external magnetic field. Recently, a nonvolatile behavior in magn…
Revealing nonvolatile behaviors in magneto-thermal switching using microstructure-controlled superconducting composites
Keigo Ito, Yui Sakamoto, Hossein Sepehri-Amin +12
Thermal conductivity in a conductor changes by the application of an external magnetic field, which functions as a magneto-thermal switch. For superconductors, a large magneto-ther…
Trans-scale spin Seebeck effect in nanostructured bulk composites based on magnetic insulator
Sang J. Park, Keisuke Hirata, Hossein Sepehri-Amin +3
The spin Seebeck effect (SSE) enables thermoelectric conversion through thermally generated spin currents in magnetic materials, offering a promising transverse geometry for scalab…
High-throughput development of flexible amorphous materials showing large anomalous Nernst effect via automatic annealing and thermoelectric imaging
Sang J. Park, Ravi Gautam, Abdulkareem Alasli +5
This work demonstrates high-throughput screening of flexible magnetic materials for efficient transverse thermoelectric conversion based on the anomalous Nernst effect (ANE). The a…
Fundamentals and advances in transverse thermoelectrics
Hiroto Adachi, Fuyuki Ando, Takamasa Hirai +3
Transverse thermoelectric effects interconvert charge and heat currents in orthogonal directions due to the breaking of either time-reversal symmetry or structural symmetry, enabli…
Quantitative measurements of transverse thermoelectric generation and cooling performances in SmCo/BiSbTe-based artificially tilted multilayer module
Masayuki Murata, Fuyuki Ando, Takamasa Hirai +2
The transverse thermoelectric generation and cooling performances in a thermopile module composed of recently developed SmCo/BiSbTe artificially tilted mult…
Adiabatic transverse thermoelectric conversion enhanced by heat current manipulation in artificially tilted multilayers
Fuyuki Ando, Takamasa Hirai, Hiroto Adachi +1
We phenomenologically formulate and experimentally observe an adiabatic transverse thermoelectric conversion enhanced by a heat current re-orientation in artificially tilted multil…
Simultaneous achievement of large anomalous Nernst effect and reduced thermal conductivity in sintered polycrystalline topological Heusler ferromagnets
Koichi Oyanagi, Hossein Sepehri-Amin, Kenta Takamori +9
This study reports the observation of the large anomalous Nernst effect in polycrystalline ferromagnetic CoMnGa (CMG) slabs prepared by a spark plasma sintering method. By op…
Designing flexible hard magnetic materials for zero-magnetic-field operation of the anomalous Nernst effect
Sang J. Park, Rajkumar Modak, Ravi Gautam +6
The global shift towards a carbon-neutral society has accelerated the demand for green energy, driving research into efficient technologies for harvesting energy from low-grade was…
Hybridizing anomalous Nernst effect in artificially tilted multilayer based on magnetic topological material
Takamasa Hirai, Fuyuki Ando, Hossein Sepehri-Amin +1
Transverse thermoelectric conversion holds significant potential in addressing complex challenges faced by classical Seebeck/Peltier modules. A promising transverse thermoelectric…
Multifunctional composite magnet realizing record-high transverse thermoelectric generation
Fuyuki Ando, Takamasa Hirai, Abdulkareem Alasli +4
Permanent magnets are used in various products and essential for human society. If omnipresent permanent magnets could directly convert heat into electricity, they would lead to in…
Permanent-magnet-based transverse thermoelectric generator with high fill factor driven by anomalous Nernst effect
Fuyuki Ando, Takamasa Hirai, Ken-ichi Uchida
A transverse thermoelectric generator for magnetic-field-free and high-density power generation utilizing the anomalous Nernst effect is constructed and its performance is characte…