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Absence of conventional spin-glass transition in the ising dipolar system LiHoxY1-xF4
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
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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 LiHoxY1-xF4 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 LiHoxY1-xF4 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
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URN: urn:nbn:se:uu:diva-15095DOI: 10.1103/PhysRevLett.98.256403ISI: 000247469400038OAI: oai:DiVA.org:uu-15095DiVA: diva2:42866
Available from: 2008-05-27 Created: 2008-05-27 Last updated: 2017-12-11Bibliographically approved

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Jönsson, Petra

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