High-resolution thermal expansion of isovalently substituted BaFe 2(As1-xPx)2

A. E. Böhmer, P. Burger, F. Hardy, T. Wolf, P. Schweiss, R. Fromknecht, H. Von Löhneysen, C. Meingast, S. Kasahara, T. Terashima, T. Shibauchi, Y. Matsuda

Research output: Contribution to journalConference articlepeer-review


We have investigated the isovalently substituted system BaFe2(As1-xPx)2 by high-resolution thermal expansion using a home-built capacitive dilatometer. Accurate measurements succeeded despite the very small size of the available single crystals (∼ 500 × 500 × 100μm3). Information on the uniaxial pressure derivatives of the transition temperatures is obtained using thermodynamic relations. In-plane and out-of-plane pressure derivatives have opposite sign, which demonstrates the sensitivity of the compound to uniaxial pressure. The structural and the superconducting transition always respond oppositely to uniaxial pressure, which signals their coupling and competition.

Original languageEnglish
Article number012122
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2012
Externally publishedYes
EventInternational Conference on Strongly Correlated Electron Systems, SCES 2011 - Cambridge, United Kingdom
Duration: Aug 29 2011Sep 3 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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