Abstract
The coupling of spin and heat gives rise to new physical phenomena in nanoscale spin devices. In particular, spin-transfer torque (STT) driven by thermal transport provides a new way to manipulate local magnetization. We quantify thermal STT in metallic spin-valve structures using an intense and ultrafast heat current created by picosecond pulses of laser light. Our result shows that thermal STT consists of demagnetization-driven and spin-dependent Seebeck effect (SDSE)-driven components; the SDSE-driven STT becomes dominant after 3 ps. The sign and magnitude of the SDSE-driven STT can be controlled by the composition of a ferromagnetic layer and the thickness of a heat sink layer.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 576-581 |
| Number of pages | 6 |
| Journal | Nature Physics |
| Volume | 11 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 1 2015 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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Thermal spin-transfer torque driven by the spin-dependent Seebeck effect in metallic spin-valves. / Choi, Gyung Min; Moon, Chul Hyun; Min, Byoung Chul; Lee, Kyung Jin; Cahill, David G.
In: Nature Physics, Vol. 11, No. 7, 01.07.2015, p. 576-581.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Thermal spin-transfer torque driven by the spin-dependent Seebeck effect in metallic spin-valves
AU - Choi, Gyung Min
AU - Moon, Chul Hyun
AU - Min, Byoung Chul
AU - Lee, Kyung Jin
AU - Cahill, David G.
PY - 2015/7/1
Y1 - 2015/7/1
N2 - The coupling of spin and heat gives rise to new physical phenomena in nanoscale spin devices. In particular, spin-transfer torque (STT) driven by thermal transport provides a new way to manipulate local magnetization. We quantify thermal STT in metallic spin-valve structures using an intense and ultrafast heat current created by picosecond pulses of laser light. Our result shows that thermal STT consists of demagnetization-driven and spin-dependent Seebeck effect (SDSE)-driven components; the SDSE-driven STT becomes dominant after 3 ps. The sign and magnitude of the SDSE-driven STT can be controlled by the composition of a ferromagnetic layer and the thickness of a heat sink layer.
AB - The coupling of spin and heat gives rise to new physical phenomena in nanoscale spin devices. In particular, spin-transfer torque (STT) driven by thermal transport provides a new way to manipulate local magnetization. We quantify thermal STT in metallic spin-valve structures using an intense and ultrafast heat current created by picosecond pulses of laser light. Our result shows that thermal STT consists of demagnetization-driven and spin-dependent Seebeck effect (SDSE)-driven components; the SDSE-driven STT becomes dominant after 3 ps. The sign and magnitude of the SDSE-driven STT can be controlled by the composition of a ferromagnetic layer and the thickness of a heat sink layer.
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U2 - 10.1038/nphys3355
DO - 10.1038/nphys3355
M3 - Article
AN - SCOPUS:84934864863
VL - 11
SP - 576
EP - 581
JO - Nature Physics
JF - Nature Physics
SN - 1745-2473
IS - 7
ER -