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High-field Magnetization and Magnetoresistance of CaCu3Ti4−x Ru x O12

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Abstract

We have investigated magnetization (M) and magnetoresistance (MR) of CaCu3Ti4−x Ru x O12 (x=0, 1.5, and 4). The magnetization in magnetic fields (H) up to 52 T decreases with increasing Ru content x. The M–H curves for x=0 and 4 are almost linear in field, but that for x=1.5 is non-linear and shows a convex-bending in high magnetic fields. Furthermore, a large negative MR about −70% at 52 T is observed for x=1.5. These experimental results suggest that the magnetic field increases the itinerancy for x=1.5.

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Authors and Affiliations

  1. KYOKUGEN, Osaka University, Toyonaka, Osaka, 560-8531, Japan

    T. Kida, R. Kammuri & M. Hagiwara

  2. IMR, Tohoku University, Sendai, Miyagi, 980-8577, Japan

    S. Yoshii

  3. Dep. of Appl. Phys., Waseda University, Shinjuku, Tokyo, 169-8555, Japan

    M. Iwakawa, W. Kobayashi & I. Terasaki

  4. ISSP, The University of Tokyo, Kashiwa, Chiba, 277-8581, Japan

    K. Kindo

Authors
  1. T. Kida
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  2. R. Kammuri
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  3. S. Yoshii
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  4. M. Hagiwara
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  5. M. Iwakawa
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  6. W. Kobayashi
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  7. I. Terasaki
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  8. K. Kindo
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Correspondence to T. Kida.

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Kida, T., Kammuri, R., Yoshii, S. et al. High-field Magnetization and Magnetoresistance of CaCu3Ti4−x Ru x O12 . J Low Temp Phys 159, 143–146 (2010). https://doi.org/10.1007/s10909-009-0108-4

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  • DOI: https://doi.org/10.1007/s10909-009-0108-4

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