Piatek, J. O.3; Dalla Piazza, B.3; Nikseresht, N.3; Tsyrulin, N.3; Zivkovic, I.4; Krämer, K. W.5; Laver, M.6; Prokes, K.7; Matas, S.8; Christensen, N. B.1; Rønnow, H. M.3
1 Department of Physics, Technical University of Denmark2 Neutrons and X-rays for Materials Physics, Department of Physics, Technical University of Denmark3 École Polytechnique Fédérale de Lausanne4 Institute of Physics5 University of Bern6 Risø National Laboratory for Sustainable Energy, Technical University of Denmark7 Helmholtz–Zentrum Berlin für Materialien und Energie8 Helmholtz-Zentrum für Materialien und Energie
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.
Physical Review B (condensed Matter and Materials Physics), 2013, Vol 88, Issue 1