Absence of conventional spin-glass transition in the Ising dipolar system LiHo(x)Y(1-x)F(4)
2007 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 98, no 25, 256403- p.Article in journal (Refereed) Published
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.
IdentifiersURN: urn:nbn:se:kth:diva-37046DOI: 10.1103/PhysRevLett.98.256403ISI: 000247469400038ScopusID: 2-s2.0-34547343723OAI: oai:DiVA.org:kth-37046DiVA: diva2:431902