Understanding spin currents from magnon dispersion and polarization: Spin-Seebeck effect and neutron scattering study on Tb3Fe5O12

被引：4

作者：

Kawamoto, Y. ^{[1
]}

Kikkawa, T. ^{[2
,3
]}

Kawamata, M. ^{[1
]}

Umemoto, Y. ^{[4
]}

Manning, A. G. ^{[5
]}

Rule, K. C. ^{[5
]}

Ikeuchi, K. ^{[6
]}

Kamazawa, K. ^{[7
]}

Fujita, M. ^{[4
]}

Saitoh, E. ^{[2
,3
,8
,9
]}

Kakurai, K. ^{[10
,11
]}

Nambu, Y. ^{[4
,12
,13
]}

机构：

[1] Tohoku Univ, Dept Phys, Sendai 9808578, Japan

[2] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[3] Tohoku Univ, WPI Adv Inst Mat Res, Sendai 9808577, Japan

[4] Tohoku Univ, Inst Mat Res, Sendai 9808577, Japan

[5] Australian Nucl Sci & Technol Org, Locked Bag 2001, Kirrawee, NSW 2232, Australia

[6] High Energy Accelerator Res Org, Inst Mat Struct Sci, Tokai 3191106, Japan

[7] Comprehens Res Org Sci & Soc, Tokai, 3000811, Japan

[8] Univ Tokyo, Inst AI & Beyond, Tokyo 1138656, Japan

[9] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai 3191195, Japan

[10] RIKEN, Ctr Emergent Matter Sci, Saitama 3510198, Japan

[11] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai 9808577, Japan

[12] Tohoku Univ, Org Adv Studies, Sendai 9808577, Japan

[13] Japan Sci & Technol Agcy, Saitama 3320012, Japan

来源：

APPLIED PHYSICS LETTERS | 2024年 / 124卷 / 13期

基金：

日本学术振兴会;

关键词：

EXCHANGE INTERACTIONS; TRIPLE-AXIS; TRANSPORT; SPECTRA;

D O I：

10.1063/5.0197831

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnon spin currents in the ferrimagnetic garnet Tb3Fe5O12 with 4f electrons were examined through the spin-Seebeck effect and neutron scattering measurements. The compound shows a magnetic compensation, where the spin-Seebeck signal reverses above and below T (comp) = 249.5 ( 4 ) K. Unpolarized neutron scattering unveils two major magnon branches with finite energy gaps, which are well explained in the framework of spin-wave theory. Their temperature dependencies and the direction of the precession motion of magnetic moments, i.e., magnon polarization, defined using polarized neutrons, explain the reversal at T- comp and decay of the spin-Seebeck signals at low temperatures. We illustrate an example that momentum- and energy-resolved microscopic information is a prerequisite to understand the magnon spin current.

引用

页数：7

共 49 条

[1] Linear-response theory of spin Seebeck effect in ferromagnetic insulators [J].

Adachi, Hiroto ;

Ohe, Jun-ichiro ;

Takahashi, Saburo ;

Maekawa, Sadamichi .

PHYSICAL REVIEW B, 2011, 83 (09)

[2]

[Anonymous], 1992, Neutron News, DOI 10.1080/10448639208218770

[3]

[Anonymous], 2006, Neutron scattering from magnetic materials

[4] Dc effect in ferromagnetic resonance: Evidence of the spin-pumping effect? [J].

Azevedo, A ;

Leao, LHV ;

Rodriguez-Suarez, RL ;

Oliveira, AB ;

Rezende, SM .

JOURNAL OF APPLIED PHYSICS, 2005, 97 (10)

[5] Thermal Spin Dynamics of Yttrium Iron Garnet [J].

Barker, Joseph ;

Bauer, Gerrit E. W. .

PHYSICAL REVIEW LETTERS, 2016, 117 (21)

[6] THE SAGA OF YIG-SPECTRA, THERMODYNAMICS, INTERACTION AND RELAXATION OF MAGNONS IN A COMPLEX MAGNET [J].

CHEREPANOV, V ;

KOLOKOLOV, I ;

LVOV, V .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1993, 229 (03) :81-144

[7] POLARIZATION OF HE3 GAS BY OPTICAL PUMPING [J].

COLEGROVE, FD ;

SCHEARER, LD ;

WALTERS, GK .

PHYSICAL REVIEW, 1963, 132 (06) :2561-&

[8]

Cornelissen LJ, 2015, NAT PHYS, V11, P1022, DOI [10.1038/NPHYS3465, 10.1038/nphys3465]

[9] Magnon Mode Selective Spin Transport in Compensated Ferrimagnets [J].

Cramer, Joel ;

Guo, Er-Jia ;

Gepraegs, Stephan ;

Kehlberger, Andreas ;

Ivanov, Yurii P. ;

Ganzhorn, Kathrin ;

Della Coletta, Francesco ;

Althammer, Matthias ;

Huebl, Hans ;

Gross, Rudolf ;

Kosel, Jurgen ;

Klaeui, Mathias ;

Goennenwein, Sebastian T. B. .

NANO LETTERS, 2017, 17 (06) :3334-3340

[10]

GELLER S, 1965, PHYS REV, V137, P1034

← 1 2 3 4 5 →