Spin Pumping without Three-Magnon Splitting in Polycrystalline Bi1Y2Fe5O12/Pt Bilayer Structure

被引：28

作者：

Iguchi, Ryo ^{[1
]}

Ando, Kazuya ^{[2
]}

Takahashi, Ryo ^{[2
]}

An, Toshu ^{[2
]}

Saitoh, Eiji ^{[2
,3
,4
,5
]}

Sato, Tetsuya ^{[1
]}

机构：

[1] Keio Univ, Fac Sci & Technol, Dept Appl Phys & Physicoinformat, Yokohama, Kanagawa 2238522, Japan

[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

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

[4] Japan Sci & Technol Agcy, CREST, Chiyoda Ku, Tokyo 1020075, Japan

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

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2012年 / 51卷 / 10期

关键词：

FILMS;

D O I：

10.1143/JJAP.51.103004

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Spin pumping at various precession frequencies has been investigated in a polycrystalline Bi-substituted yttrium iron garnet (Bi:YIG)/Pt bilayer structure by means of inverse spin Hall effect (ISHE) with comparison to a single crystal La-substituted yttrium iron garnet (La:YIG)/Pt bilayer structure which shows three-magnon splitting. As precession frequency decreases, the magnitude of pumped spin currents in the polycrystalline sample continuously increases to high magnitude comparable to the highest magnitude in the single crystal sample while that in the single crystal sample decreases below a threshold frequency of three-magnon splitting. By comparing ISHE voltage with microwave absorption intensity in the polycrystalline sample, we verify that the large magnitude of the pumped spin currents is maintained at low frequencies through the suppression of three-magnon splitting. (C) 2012 The Japan Society of Applied Physics

引用

页数：5

共 29 条

[1] Ando K, 2011, NAT MATER, V10, P655, DOI [10.1038/nmat3052, 10.1038/NMAT3052]
[2] Inverse spin-Hall effect induced by spin pumping in metallic system
Ando, K.
Takahashi, S.
Ieda, J.
Kajiwara, Y.
Nakayama, H.
Yoshino, T.
Harii, K.
Fujikawa, Y.
Matsuo, M.
Maekawa, S.
Saitoh, E.
[J]. JOURNAL OF APPLIED PHYSICS, 2011, 109 (10)
[3] Observation of the inverse spin Hall effect in silicon
Ando, Kazuya
Saitoh, Eiji
[J]. NATURE COMMUNICATIONS, 2012, 3
[4] Spin pumping and anisotropic magnetoresistance voltages in magnetic bilayers: Theory and experiment
Azevedo, A.
Vilela-Leao, L. H.
Rodriguez-Suarez, R. L.
Santos, A. F. Lacerda
Rezende, S. M.
[J]. PHYSICAL REVIEW B, 2011, 83 (14)
[5] Enhanced spin pumping at yttrium iron garnet/Au interfaces
Burrowes, C.
Heinrich, B.
Kardasz, B.
Montoya, E. A.
Girt, E.
Sun, Yiyan
Song, Young-Yeal
Wu, Mingzhong
[J]. APPLIED PHYSICS LETTERS, 2012, 100 (09)
[6] Scaling Behavior of the Spin Pumping Effect in Ferromagnet-Platinum Bilayers
Czeschka, F. D.
Dreher, L.
Brandt, M. S.
Weiler, M.
Althammer, M.
Imort, I. -M.
Reiss, G.
Thomas, A.
Schoch, W.
Limmer, W.
Huebl, H.
Gross, R.
Goennenwein, S. T. B.
[J]. PHYSICAL REVIEW LETTERS, 2011, 107 (04)
[7] A phenomenological theory of damping in ferromagnetic materials
Gilbert, TL
[J]. IEEE TRANSACTIONS ON MAGNETICS, 2004, 40 (06) : 3443 - 3449
[8] GROWTH-INDUCED UNIAXIAL ANISOTROPY OF BISMUTH-SUBSTITUTED IRON-GARNET FILMS
HANSEN, P
WITTER, K
[J]. JOURNAL OF APPLIED PHYSICS, 1985, 58 (01) : 454 - 459
[9] Frequency dependence of spin pumping in Pt/Y3Fe5O12 film
Harii, Kazuya
An, Toshu
Kajiwara, Yosuke
Ando, Kazuya
Nakayama, Hiroyasu
Yoshino, Tatsuro
Saitoh, Eiji
[J]. JOURNAL OF APPLIED PHYSICS, 2011, 109 (11)
[10] Spin Pumping at the Magnetic Insulator (YIG)/Normal Metal (Au) Interfaces
Heinrich, B.
Burrowes, C.
Montoya, E.
Kardasz, B.
Girt, E.
Song, Young-Yeal
Sun, Yiyan
Wu, Mingzhong
[J]. PHYSICAL REVIEW LETTERS, 2011, 107 (06)

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