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Phase diagram with an enhanced spin-glass region of the mixed Ising-XY magnet LiHoxEr1-xF4

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Publication date 2013
Author Piatek J. O., Dalla Piazza B., Nikseresht N., Tsyrulin N., Zivkovic I., Kraemer K. W., Laver M., Prokes K., Matas S., Christensen N. B., Ronnow H. M.,
Project Mott Physics Beyond the Heisenberg Model in Iridates and Related Materials
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Original article (peer-reviewed)

Journal PHYSICAL REVIEW B
Volume (Issue) 88(1)
Page(s) 014408
Title of proceedings PHYSICAL REVIEW B
DOI 10.1103/PhysRevB.88.014408

Open Access

URL http://infoscience.epfl.ch/record/187552?ln=en
Type of Open Access Repository (Green Open Access)

Abstract

We present the experimental phase diagram of LiHoxEr1-xF4, a dilution series of dipolar-coupled model magnets. The phase diagram was determined using a combination of ac susceptibility and neutron scattering. Three unique phases in addition to the Ising ferromagnet LiHoF4 and the XY antiferromagnet LiErF4 have been identified. Below x=0.86, an embedded spin-glass phase is observed, where a spin glass exists within the ferromagnetic structure. Below x=0.57, an Ising spin glass is observed consisting of frozen needlelike clusters. For x∼0.3–0.1, an antiferromagnetically coupled spin glass occurs. A reduction of TC(x) for the ferromagnet is observed which disobeys the mean-field predictions that worked for LiHoxY1-xF4.
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