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Absence of conventional spin-glass transition in the Ising dipolar system LiHo(x)Y(1-x)F(4)
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
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2007 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 98, no 25, 256403- p.Article in journal (Refereed) Published
Abstract [en]

The magnetic properties of single crystals of LiHo(x)Y(1-x)F(4) with x=16.5% and x=4.5% were recorded down to 35 mK using a micro-SQUID magnetometer. While this system is considered as the archetypal quantum spin glass, the detailed analysis of our magnetization data indicates the absence of a phase transition, not only in a transverse applied magnetic field, but also without field. A zero-Kelvin phase transition is also unlikely, as the magnetization seems to follow a noncritical exponential dependence on the temperature. Our analysis thus unmasks the true, short-ranged nature of the magnetic properties of the LiHo(x)Y(1-x)F(4) system, validating recent theoretical investigations suggesting the lack of phase transition in this system.

Place, publisher, year, edition, pages
2007. Vol. 98, no 25, 256403- p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-37046DOI: 10.1103/PhysRevLett.98.256403ISI: 000247469400038Scopus ID: 2-s2.0-34547343723OAI: oai:DiVA.org:kth-37046DiVA: diva2:431902
Available from: 2011-07-27 Created: 2011-07-27 Last updated: 2017-12-08Bibliographically approved

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