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  1. B200 工学部/工学研究科
  2. B200a 雑誌掲載論文
  3. 学術雑誌

Giant magnetoresistance of a two-dimensional ferromagnet La_{2-2x}Ca_{1+2x}Mn_2O_7

http://hdl.handle.net/2237/6988
88e3760d-2efc-4dd3-9606-411db8df7141
名前 / ファイル ライセンス アクション
ApplPhysLett_68_3638.pdf ApplPhysLett_68_3638.pdf (78.6 kB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2006-10-20
タイトル
タイトル Giant magnetoresistance of a two-dimensional ferromagnet La_{2-2x}Ca_{1+2x}Mn_2O_7
著者 Asano, H.

× Asano, H.

WEKO 13730

Asano, H.

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Hayakawa, J.

× Hayakawa, J.

WEKO 13731

Hayakawa, J.

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Matsui, M.

× Matsui, M.

WEKO 13732

Matsui, M.

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権利
権利情報 Copyright (1996) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
抄録
内容記述 Bulk samples of La_{2-2x}Ca_{1+2x}Mn_2O_7 with the layered Sr_3Ti_2O_7-type perovskite structure have
been successfully synthesized and investigated with respect to their magnetic and electrical
properties. It is found that La_{2-2x}Ca_{1+2x}Mn_2O_7 (x=0.25) is a metallic ferromagnet with a magnetic
transition temperature T_c of 215 K. The large magnetoresistance (MR) effect with Δρ/ρ_0 of ~ 60%
at 1.8 T was observed in a wide temperature range below a cusp temperature in resistivity of 96 K,
which is well below the magnetic T_c . This behavior is quite different from that of the well-known
double-exchange ferromagnets such as La_{1-x}Ca_xMnO_3, where large MR effects are restricted to a
narrow temperature range around the ferromagnetic transition. The present result could be
interpreted by using the double-exchange theory incorporating the anisotropy resulting from the
two-dimensional Mn-O-Mn networks in La_{2-2x}Ca_{1+2x}Mn_2O_7.
内容記述タイプ Abstract
出版者
出版者 American Institute of Physics
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
DOI
関連識別子
識別子タイプ DOI
関連識別子 http://dx.doi.org/10.1063/1.115755
ISSN
収録物識別子タイプ ISSN
収録物識別子 0003-6951
書誌情報 Applied Physics Letters

巻 68, 号 25, p. 3638-3640, 発行日 1996-06-17
フォーマット
application/pdf
著者版フラグ
値 publisher
URI
識別子 http://hdl.handle.net/2237/6988
識別子タイプ HDL
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