Person
Junfeng Hu
This person is no longer with EPFL
Related publications (10)
Large Anomalous Nernst Angle in Co2MnGa Thin Film
Jean-Philippe Ansermet, Haiming Yu, Simon Granville, Junfeng Hu, Yao Zhang, Song Liu
The new trends for anomalous Nernst effect (ANE)-based thermoelectric devices require materials with large ANE values to realize the scalable generation of voltage. Recently, very large ANE values have been observed in single crystals of some novel magneti ...
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022Strong temperature-dependent thermoelectric power of IrMn(3)thin films of different thicknesses
Jean-Philippe Ansermet, Haiming Yu, Junfeng Hu, Mukund Krishna Kothari
IrMn(3)thin films were experimentally characterized by thermoelectric power and resistivity as a function of temperature and sample thickness. The Seebeck coefficient shows strong temperature dependence and the value increases with temperature up to 350 K. ...
IOP PUBLISHING LTD2021Record thermopower found in an IrMn-based spintronic stack
Jean-Philippe Ansermet, Peng Gao, Haiming Yu, Sa Tu, Junfeng Hu, Jianyu Zhang, Yao Zhang, Song Liu
The Seebeck effect converts thermal gradients into electricity. As an approach to power technologies in the current Internet-of-Things era, on-chip energy harvesting is highly attractive, and to be effective, demands thin film materials with large Seebeck ...
2020Anomalous Nernst effect in Co2MnGa thin films with perpendicular magnetic anisotropy
Jean-Philippe Ansermet, Haiming Yu, Simon Granville, Sa Tu, Junfeng Hu, Yao Zhang, Song Liu
The thermoelectric and transport properties of MgO/Co2MnGa/Pd stacks with perpendicular magnetic anisotropy were measured. For a nominal 3.3 nm Co2MnGa thickness, the anomalous Nernst coefficient and the Nernst angle at room temperature were found to be 0. ...
ELSEVIER2020Regulating the anomalous Hall and Nernst effects in Heusler-based trilayers
Jean-Philippe Ansermet, Haiming Yu, Simon Granville, Sa Tu, Junfeng Hu, Song Liu
Anomalous Hall and anomalous Nernst properties of thin MgO/Co-2Fe0.4Mn0.6Si/Pd stacks with perpendicular magnetic anisotropy (PMA) revealed the presence of the magnetic proximity effect (MPE) in the Pd layer. The MPE is evidenced by nanometer range thickne ...
2020Spin-Dependent Thermoelectric Transport in Cobalt-Based Heusler Alloys
Haiming Yu, Simon Granville, Junfeng Hu
Sitting at the intersection of spintronics and thermoelectricity, research investigating the coupling of thermoelectric, magnetic, and electrical transport properties in materials has recently found that the ferromagnetic Heusler alloys are the ideal testb ...
WILEY-V C H VERLAG GMBH2020Large magnetothermopower and anomalous Nernst effect in HfTe5
Jean-Philippe Ansermet, Arnaud Magrez, Jan Hugo Dil, Helmuth Berger, Haiming Yu, Edoardo Martino, Sa Tu, Junfeng Hu, Marco Caputo
Topological quantum materials have stimulated growing attention because they reveal novel aspects of condensed matter physics and point to new opportunities in materials science, in particular for thermoelectrics. Here, we experimentally study thermoelectr ...
AMER PHYSICAL SOC2019Doping effect on the thermoelectric transport properties of HfTe5
Jean-Philippe Ansermet, Haiming Yu, Junfeng Hu
We studied the influence of doping HfTe5 with 5% Ti on electric (resistivity and the Hall effect) and thermoelectric transport properties (the Seebeck coefficient, magneto-thermoelectric power, and Nernst effect). The properties of 5% Ti-doped HfTe5 do not ...
AMER INST PHYSICS2019Anomalous Hall and Nernst Effects in Co2TiSn and Co2Ti0.6V0.4Sn Heusler Thin Films
Jean-Philippe Ansermet, Haiming Yu, Sa Tu, Junfeng Hu, Yao Zhang
Magnetotransport (magnetoresistance and anomalous Hall effect) and thermoelectric (Seebeck and anomalous Nernst effect) effects are investigated on epitaxially grown Co2TiSn and Co2Ti0.6V0.4Sn Heusler thin films. An anomalous Nernst coefficient up to 1.8 m ...
AMER PHYSICAL SOC2018Anomalous Nernst effect in Ir22Mn78/Co20Fe60B20/MgO layers with perpendicular magnetic anisotropy
Jean-Philippe Ansermet, Haiming Yu, Sa Tu, Junfeng Hu, Jianyu Zhang, Yao Zhang, Xiangrong Wang
The anomalous Nernst effect in a perpendicularly magnetized Ir22Mn78/Co20Fe60B20/MgO thin film is measured using well-defined in-plane temperature gradients. The anomalous Nernst coefficient reaches 1.8 mu V/K at room temperature, which is almost 50 times ...
American Institute of Physics2017