Basal-plane magnetic anisotropies of high-κ d-wave superconductors in a mixed state: A quasiclassical approach

Hiroto Adachi, Predrag Miranović, Masanori Ichioka, Kazushige Machida

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    3 Citations (Scopus)

    Abstract

    We study the basal-plane anisotropies of reversible magnetization and torque in a mixed state of layered d-wave superconductors based on the quasiclassical version of the BCS-Gor'kov theory. Both the longitudinal magnetization (M L) and torque (τ) show fourfold oscillations as a function of the field angle χ. The relationship between the node position and the oscillatory patterns shown by M L and τ is clarified. It is also shown that the sign of the τ(χ)-oscillation does not change between H c1 and H c2, while the sign of the M L(χ)-oscillation changes. The newly obtained result for τ indicates that the torque experiment can allow us to detect the in-plane anisotropies of H c2 even in a material with strong fluctuations such as cuprate or organic superconductors, where the H c2 itself cannot be determined experimentally.

    Original languageEnglish
    Article number084716
    Journaljournal of the physical society of japan
    Volume75
    Issue number8
    DOIs
    Publication statusPublished - Aug 2006

    Keywords

    • In-plane anisotropy
    • Magnetization
    • Mixed state
    • Torque
    • d-wave superconductor

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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