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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 | |
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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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.× Hayakawa, J.× 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. |
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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 | ||||||
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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 |
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application/pdf | ||||||
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値 | publisher | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/6988 | |||||
識別子タイプ | HDL |