Absence of the O 17 Knight-shift changes across the first-order phase transition line in Sr2RuO4

Masahiro Manago, Kenji Ishida, Zhiqiang Mao, Yoshiteru Maeno

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

We performed O17 nuclear magnetic resonance measurements on superconducting (SC) Sr2RuO4 under in-plane magnetic fields. We found that no new signal appears in the SC state and that the O17 Knight shifts obtained from the double-site measurements remain constant across the first-order phase-transition line, as well as across the second-order phase-transition line as already reported. The present results indicate that the SC spin susceptibility does not decrease in the high-field region, although a magnetization jump in the SC state was reported at low temperatures. Because the spin susceptibility is unchanged in the SC state in Sr2RuO4, we suggest that the first-order phase transition across the upper critical field should be interpreted as a depairing mechanism other than the conventional Pauli-paramagnetic effect.

Original languageEnglish (US)
Article number180507
JournalPhysical Review B
Volume94
Issue number18
DOIs
StatePublished - Jan 1 2016

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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