Electrical resistivity in ferromagnetic TM-Al-O (TM = Fe, Co) granular films: scattering by spin waves and kondo like behavior

Shintaro Nakamura; Tsutomu Nojima; Akira Yoshihara; Shigehiro Ohnuma; Hiroyasu Fujimori

doi:10.1143/JPSJ.78.074708

Electrical resistivity in ferromagnetic TM-Al-O (TM = Fe, Co) granular films: scattering by spin waves and kondo like behavior

Shintaro Nakamura, Tsutomu Nojima, Akira Yoshihara, Shigehiro Ohnuma, Hiroyasu Fujimori

金属材料研究所 (研究所レベル所属のみ)

研究成果: Article › 査読

7 被引用数 (Scopus)

抄録

We investigate the electrical resistivity of the ferromagnetic granular thin films TM-Al-O (TM = Fe, Co). The resistivity shows T ²behavior at low temperatures in all metallic samples. This strongly suggests scattering of conduction electrons by thermally excited ferromagnetic spin waves. Logarithmic Kondo like behavior (mdashlog T) in the resistivity and negative magnetoresistivity at low temperatures are observed. With decreasing concentration of transition metal, both the coefficients of the T ²and log T terms increase.

本文言語	English
論文番号	074708
ジャーナル	Journal of the Physical Society of Japan
巻	78
号	7
DOI	https://doi.org/10.1143/JPSJ.78.074708
出版ステータス	Published - 2009 7月 1

ASJC Scopus subject areas

物理学および天文学（全般）

文献へのアクセス

10.1143/JPSJ.78.074708

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引用スタイル

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abstract = "We investigate the electrical resistivity of the ferromagnetic granular thin films TM-Al-O (TM = Fe, Co). The resistivity shows T 2behavior at low temperatures in all metallic samples. This strongly suggests scattering of conduction electrons by thermally excited ferromagnetic spin waves. Logarithmic Kondo like behavior (mdashlog T) in the resistivity and negative magnetoresistivity at low temperatures are observed. With decreasing concentration of transition metal, both the coefficients of the T 2and log T terms increase.",

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AU - Ohnuma, Shigehiro

AU - Fujimori, Hiroyasu

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KW - Kondo like behavior

KW - Magnetoresistivity

KW - Magnon scattering

KW - Spin wave

KW - Transition metal

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