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Pressure-enhanced giant magnetoresistance in Fe/Cr magnetic multilayers

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Abstract

The magnetoresistance of Fe/Cr magnetic multilayers (MMLs) on the 1st and the 2nd peaks has been measured at high pressure up to 3 GPa at low temperature in order to make clear the characteristics of the giant magnetoresistance (GMR) under high pressure. The GMRs of the MMLs on the 2nd peak are found to be enhanced strongly by applying pressure whereas those of 1st peak MMLs decrease with increasing pressure. The magnitude of GMR of the 2nd peak MMLs becomes about twice or more at 2 GPa compared with the value at ambient pressure. The large difference in the pressure dependences is explained by assuming a pressure-induced crossover in the interlayer exchange coupling from the biquadratic to the bilinear spin arrangements.

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Authors and Affiliations

  1. Kurume Institute of Technology, Kurume, Fukuoka, 830-0052, Japan

    Gendo Oomi

  2. Department of Physics, Kyushu University, Fukuoka, 812-8581, Japan

    Shuhei Higashihara & Kazufumi Suenaga

  3. Institute of Materials Research, Tohoku University, Sendai, 980-8577, Japan

    Kesami Saito & Koki Takanashi

  4. National Institute for Materials Science, Tsukuba, Ibaraki, 305-0047, Japan

    Seiji Mitani

Authors
  1. Gendo Oomi
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  2. Shuhei Higashihara
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  3. Kazufumi Suenaga
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  4. Kesami Saito
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  5. Koki Takanashi
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  6. Seiji Mitani
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Correspondence to Gendo Oomi.

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Oomi, G., Higashihara, S., Suenaga, K. et al. Pressure-enhanced giant magnetoresistance in Fe/Cr magnetic multilayers. Journal of the Korean Physical Society 62, 1929–1932 (2013). https://doi.org/10.3938/jkps.62.1929

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  • DOI: https://doi.org/10.3938/jkps.62.1929

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