Phase diagram with enhanced spin-glass region of mixed Ising / XY magnets LiHo$_{x}$Er$_{1-x}$F$_{4}$

J. O. Piatek, B. Dalla Piazza, N. Nikseresht, N. Tsyrulin, I. Živković, K. W. Krämer, M. Laver, K. Prokes, S. Mataš, N. B. Christensen, H. M. Rønnow

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6 Citations (Scopus)
173 Downloads (Pure)

Abstract

We present the experimental phase diagram of LiHo$_x$Er$_{1-x}$F$_4$, 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 LiHoF$_4$ and the XY anti-ferromagnet LiErF$_4$ 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 needle-like clusters. For $x \sim 0.3 - 0.1$ an antiferromagnetically coupled spin-glass occurs. A reduction of $T_C(x)$ for the ferromagnet is observed which disobeys the mean-field predictions that worked for LiHo$_x$Y$_{1-x}$F$_4$.
Original languageEnglish
Article number014408
JournalPhysical Review B
Volume88
DOIs
Publication statusPublished - 8 Jul 2013

Bibliographical note

11 pages, 5 figures

Keywords

  • cond-mat.str-el

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