Anisotropic dc magnetization of superconducting upt3and antiferromagnetic ordering below 20 mk

Stephan Schöttl, Erwin A. Schuberth, Karol Flachbart, Jan B. Kycia, J. I. Hong, D. N. Seidman, William P. Halperin, J. Hufnagl, Ernst Bucher

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

We have measured the dc magnetization of three high-quality single crystals of UPt3with a SQUID magnetometer down to ≈5 mK in magnetic fields below 2 mT. With B虀 in the ĉ direction we find a double superconducting transition, while for B虀||â we observe only one. At lower temperatures the temperature dependence of the magnetization follows power laws indicating unconventional behavior for the penetration depth. Below 20 mK a steep diamagnetic drop occurs, coinciding with the specific heat anomaly which we found earlier at 18 mK, pointing to static antiferromagnetic order.

Original languageEnglish (US)
Pages (from-to)2378-2381
Number of pages4
JournalPhysical review letters
Volume82
Issue number11
DOIs
StatePublished - 1999

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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