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Magnetic torque ofκ-(BEDT-TTF)2Cu[N(CN)2]Br single crystal

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Abstract

Magnetic torque of the single crystal of a layered superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br has been measured as a function of field direction with respect to the b-axis under several magnetic fields H up to 8 kOe in the temperature range from 1.5 to 20 K. Smaller value of the anisotropy parameter γ = 180 is obtained for Cu[N(CN)2]Br salt than our previous report γ = 350 for κ-(BEDT-TTF)2Cu(NCS)2. The irreversible region in H — T phase diagram for Cu[N(CN)2]Br salt with smaller γ is larger than that for Cu(NCS)2 salt. A sharp cusp due to the intrinsic pinning is found near H∥ac-plane as in the case of our previous report on other layered superconductors.

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Authors and Affiliations

  1. Department of Physics and Electronics, Osaka Prefecture University, Sakai, 593, Osaka, Japan

    Shuichi Kawamata, Kiichi Okuda, Takahiko Sasaki & Naoki Toyota

  2. Institute for Materials Research, Tohoku University, 980-77, Sendai, Japan

    Takahiko Sasaki

  3. Research Institute for Advanced Science and Technology, Osaka Prefecture University, Sakai, 593, Osaka, Japan

    Naoki Toyota

Authors
  1. Shuichi Kawamata
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  2. Kiichi Okuda
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  3. Takahiko Sasaki
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  4. Naoki Toyota
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Kawamata, S., Okuda, K., Sasaki, T. et al. Magnetic torque ofκ-(BEDT-TTF)2Cu[N(CN)2]Br single crystal. J Low Temp Phys 105, 1721–1726 (1996). https://doi.org/10.1007/BF00753947

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  • DOI: https://doi.org/10.1007/BF00753947

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