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Type: Artigo de periódico
Title: Emergent Antiferromagnetism Out Of The "hidden-order" State In Uru2si2: High Magnetic Field Nuclear Magnetic Resonance To 40 T
Author: Sakai H.
Tokunaga Y.
Kambe S.
Urbano R.R.
Suzuki M.-T.
Kuhns P.L.
Reyes A.P.
Tobash P.H.
Ronning F.
Bauer E.D.
Thompson J.D.
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. © 2014 American Physical Society.
Editor: American Physical Society
Citation: Physical Review Letters. American Physical Society, v. 112, n. 23, p. - , 2014.
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.112.236401
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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