Observation of an unusual magnetic anomaly in the superconducting mixed state of heavy-fermion compound UBe13 by precise dc magnetization measurements

Yusei Shimizu, Yoshinori Haga, Yoichi Ikeda, Tatsuya Yanagisawa, Hiroshi Amitsuka

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15 Citations (Scopus)

Abstract

We have performed precise dc magnetization measurements for a single crystal of UBe13 down to 0.14K, up to 80kOe. We observed a magnetic anomaly in the superconducting (SC) mixed state at a field, named HMag* (∼26kOe, at 0.14K), implying that UBe13 has a magnetically unusual SC state. We studied the magnetization curves of UBe13, assuming that the HMag* anomaly originates from (1) and unusual SC diamagnetic response, or (2)a peculiarity of the normal-state magnetization due to vortices in the SC mixed state. The origin of the HMag* anomaly is discussed.

Original languageEnglish
Article number217001
JournalPhysical review letters
Volume109
Issue number21
DOIs
Publication statusPublished - 2012 Nov 20

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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