Thermoelectric spin transport through ferromagnetic heterostructures

• Published in: Физика низких температур
• Date: 2015
• Main Author: Bender, S.A.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2015
• Subjects: К 80-летию уравнения Ландау–Лифшица
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/128088
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Thermoelectric spin transport through ferromagnetic heterostructures / S. A. Bender // Физика низких температур. — 2015. — Т. 41, № 10. — С. 1054–1062. — Бібліогр.: 37 назв. — англ.

We study how spin is transferred by ferromagnetic dynamics in a charge insulator in response to a thermoelectric
 bias, which is established by supplying heat and/or spin accumulation via normal leads. At zero temperature,
 magnetic anisotropies pin the macroscopic order, which necessitates a finite threshold bias to induce a spin
 current in a steady state of unpinned dynamics. At finite temperatures, however, thermal spin waves provide a
 spin transport channel in response to a linear thermoelectric bias. The theoretical description is rooted in the
 Landau–Lifshitz–Gilbert phenomenology both for the macroscopic dynamics of the magnetic order and quantum
 kinetics of thermal magnons. In this paper we connect the classical and quantum aspects of the underlying magnetic
 dynamics and spin transport, as well as provide a unified view of the exchange mediated bias of spin Seebeck
 physics of the magnetic interface and bulk.