scholarly journals Interplay of spin-orbit torque and thermoelectric effects in ferromagnet/normal-metal bilayers

2014 ◽  
Vol 90 (22) ◽  
Author(s):  
Can Onur Avci ◽  
Kevin Garello ◽  
Mihai Gabureac ◽  
Abhijit Ghosh ◽  
Andreas Fuhrer ◽  
...  
Keyword(s):  
Normal Metal ◽  
Spin Orbit ◽  
Thermoelectric Effects ◽  
Metal Bilayers

scholarly journals Inductive detection of fieldlike and dampinglike ac inverse spin-orbit torques in ferromagnet/normal-metal bilayers

2018 ◽  
Vol 97 (9) ◽  
Author(s):  
Andrew J. Berger ◽  
Eric R. J. Edwards ◽  
Hans T. Nembach ◽  
Alexy D. Karenowska ◽  
Mathias Weiler ◽  
...  
Keyword(s):  
Normal Metal ◽  
Spin Orbit ◽  
Metal Bilayers

scholarly journals Proximity-induced pseudogap in mesoscopic superconductor/normal-metal bilayers

2010 ◽  
Vol 82 (14) ◽  
Author(s):  
Guo-Qiao Zha ◽  
Lucian Covaci ◽  
Shi-Ping Zhou ◽  
F. M. Peeters
Keyword(s):  
Normal Metal ◽  
Mesoscopic Superconductor ◽  
Metal Bilayers

scholarly journals Nonlinear thermoelectric effects in high-field superconductor-ferromagnet tunnel junctions

2016 ◽  
Vol 7 ◽  
pp. 1579-1585 ◽  
Author(s):  
Stefan Kolenda ◽  
Peter Machon ◽  
Detlef Beckmann ◽  
Wolfgang Belzig
Keyword(s):  
Heat Transport ◽  
Normal Metal ◽  
Hybrid Structures ◽  
Metal Nanostructures ◽  
Thermal Excitation ◽  
Thermoelectric Effects ◽  
Electron Hole ◽  
Metal Structures ◽  
Dc Bias ◽  
Microscopic Origin

Background: Thermoelectric effects result from the coupling of charge and heat transport and can be used for thermometry, cooling and harvesting of thermal energy. The microscopic origin of thermoelectric effects is a broken electron–hole symmetry, which is usually quite small in metal structures. In addition, thermoelectric effects decrease towards low temperatures, which usually makes them vanishingly small in metal nanostructures in the sub-Kelvin regime. Results: We report on a combined experimental and theoretical investigation of thermoelectric effects in superconductor/ferromagnet hybrid structures. We investigate the dependence of thermoelectric currents on the thermal excitation, as well as on the presence of a dc bias voltage across the junction. Conclusion: Large thermoelectric effects are observed in superconductor/ferromagnet and superconductor/normal-metal hybrid structures. The spin-independent signals observed under finite voltage bias are shown to be reciprocal to the physics of superconductor/normal-metal microrefrigerators. The spin-dependent thermoelectric signals in the linear regime are due to the coupling of spin and heat transport, and can be used to design more efficient refrigerators.

scholarly journals Orbital torque in magnetic bilayers

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dongjoon Lee ◽  
Dongwook Go ◽  
Hyeon-Jong Park ◽  
Wonmin Jeong ◽  
Hye-Won Ko ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Hall Effect ◽  
Spin Current ◽  
Spin Hall Effect ◽  
Spin Orbit ◽  
Magnetic Torque ◽  
Device Applications ◽  
Metal Bilayers ◽  
Experiment Analysis ◽  
Theory And Experiment

AbstractThe orbital Hall effect describes the generation of the orbital current flowing in a perpendicular direction to an external electric field, analogous to the spin Hall effect. As the orbital current carries the angular momentum as the spin current does, injection of the orbital current into a ferromagnet can result in torque on the magnetization, which provides a way to detect the orbital Hall effect. With this motivation, we examine the current-induced spin-orbit torques in various ferromagnet/heavy metal bilayers by theory and experiment. Analysis of the magnetic torque reveals the presence of the contribution from the orbital Hall effect in the heavy metal, which competes with the contribution from the spin Hall effect. In particular, we find that the net torque in Ni/Ta bilayers is opposite in sign to the spin Hall theory prediction but instead consistent with the orbital Hall theory, which unambiguously confirms the orbital torque generated by the orbital Hall effect. Our finding opens a possibility of utilizing the orbital current for spintronic device applications, and it will invigorate researches on spin-orbit-coupled phenomena based on orbital engineering.

Spin-orbit torques and their angular dependence in ferromagnet/normal metal heterostructures

2019 ◽  
Vol 115 (12) ◽  
pp. 122405
Author(s):  
Hyung Keun Gweon ◽  
Kyung-Jin Lee ◽  
Sang Ho Lim
Keyword(s):  
Angular Dependence ◽  
Normal Metal ◽  
Spin Orbit

Spin Orbit Torques in Heavy-Metal/Ferromagnet/Normal-Metal Trilayers

2017 ◽  
Author(s):  
Y. Du ◽  
Y.-C. Lau ◽  
J. Nitta ◽  
M. Hayashi
Keyword(s):  
Heavy Metal ◽  
Normal Metal ◽  
Spin Orbit

scholarly journals Subgap Density of States in Superconductor-Normal Metal Bilayers in the Cooper Limit

2004 ◽  
Vol 93 (25) ◽  
Author(s):  
Zhenyi Long ◽  
M. D. Stewart ◽  
Taejoon Kouh ◽  
James M. Valles
Keyword(s):  
Density Of States ◽  
Normal Metal ◽  
Metal Bilayers

Spin-orbit torque in ferromagnet/heavy-metal bilayers from first principles (Conference Presentation)

2019 ◽  
Author(s):  
Kirill D. Belashchenko ◽  
Alexey Kovalev ◽  
Mark van Schilfgaarde
Keyword(s):  
Heavy Metal ◽  
First Principles ◽  
Spin Orbit ◽  
Metal Bilayers
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