Emergent antiferromagnetism out of the "hidden-order" state in URu2Si2: High magnetic field nuclear magnetic resonance to 40 T

H. Sakai, Y. Tokunaga, S. Kambe, R. R. Urbano, M. T. Suzuki, P. L. Kuhns, A. P. Reyes, P. H. Tobash, F. Ronning, E. D. Bauer, J. D. Thompson

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7 Citations (Scopus)

Abstract

Very high field Si29-NMR measurements using a fully Si29-enriched URu2Si2 single crystal were carried out in order to microscopically investigate the "hidden order" (HO) state and adjacent magnetic phases in the high field limit. At the lowest measured temperature of 0.4 K, a clear anomaly reflecting a Fermi surface instability near 22 T inside the HO state is detected by the Si29 shift, Kc29. Moreover, a strong enhancement of Kc29 develops near a critical field Hc≃35.6T, and the Si29-NMR signal disappears suddenly at Hc, indicating the total suppression of the HO state. Nevertheless, a weak and shifted Si29-NMR signal reappears for fields higher than Hc at 4.2 K, providing evidence for a magnetic structure within the magnetic phase caused by the Ising-type anisotropy of the uranium ordered moments.

Original languageEnglish
Article number236401
JournalPhysical review letters
Volume112
Issue number23
DOIs
Publication statusPublished - 2014 Jun 10

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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