Phase diagram with an enhanced spin-glass region of the mixed Ising–XY magnet LiHoxEr1-xF4
نویسندگان
چکیده
J. O. Piatek,1,* B. Dalla Piazza,1 N. Nikseresht,1 N. Tsyrulin,1 I. Živković,2 K. W. Krämer,3 M. Laver,4,5 K. Prokes,6 S. Mataš,6 N. B. Christensen,5 and H. M. Rønnow1 1LQM, ICMP, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland 2Institute of Physics, Biječnika c. 46, HR-10000, Zagreb, Croatia 3Department of Chemistry and Biochemistry, University of Bern, CH-3012 Bern, Switzerland 4Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen, Switzerland 5Department of Physics, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark 6Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner Platz 1, D-14109, Berlin, Germany (Received 5 March 2013; published 8 July 2013)
منابع مشابه
Specific heat of the dilute Ising magnet LiHoxY1-xF4.
We present specific heat data on three samples of the dilute Ising magnet LiHoxY1-xF4 with x=0.018, 0.045, and 0.080. Previous measurements of the ac susceptibility of an x=0.045 sample showed the Ho3+ moments to remain dynamic down to very low temperatures, and the specific heat was found to have unusually sharp features. In contrast, our measurements do not exhibit these sharp features in the...
متن کاملExact results on spin glass models
Exact and/or rigorous results are reviewed for the Ising and XY /Villain spin glasses in finite dimensions, such as the exact energy, correlation identities and a functional relation between the distribution functions of ferromagnetic and spin glass order parameters. This last relation is useful to prove that the phase space is not complex on a line in the phase diagram. The spin wave theory ne...
متن کاملGauge Theory for Quantum Spin Glasses
The gauge theory for random spin systems is extended to quantum spin glasses to derive a number of exact and/or rigorous results. The transverse Ising model and the quantum gauge glass are shown to be gauge invariant. For these models, an identity is proved that the expectation value of the gauge invariant operator in the ferromagnetic limit is equal to the one in the classical equilibrium stat...
متن کامل2 00 6 Spin glass behaviour on random lattices
The ground-state phase diagram of an Ising spin-glass model on a random graph with an arbitrary fraction (w) of ferromagnetic interactions is analysed in the presence of an external field. Using the replica method, and performing an analysis of stability of the replica-symmetric solution, it was shown that w = 1/2, correponding to an unbiased spin glass, is a singular point in the phase diagram...
متن کاملMagnetic Properties in a Spin-1 Random Transverse Ising Model on Square Lattice
In this paper we investigate the effect of a random transverse field, distributed according to a trimodal distribution, on the phase diagram and magnetic properties of a two-dimensional lattice (square with z=4), ferromagnetic Ising system consisting of magnetic atoms with spin-1. This study is done using the effectivefield theory (EFT) with correlations method. The equations are derived using...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2013