Coexistence of Spin-Glass and Antiferromagnetic Orders in the Ising System <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Fe</mi></mrow><mrow><mn>0.55</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Mg</mi></mrow><mrow><mn>0.45</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Cl</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math>

Po-zen Wong; S. von Molnar; T. T. M. Palstra; J. A. Mydosh; H. Yoshizawa; S. M. Shapiro; A. Ito

doi:10.1103/PhysRevLett.55.2043

Coexistence of Spin-Glass and Antiferromagnetic Orders in the Ising System ${Fe}_{0.55}$ ${Mg}_{0.45}$ ${Cl}_{2}$

Po-zen Wong, S. von Molnar, T. T. M. Palstra, J. A. Mydosh, H. Yoshizawa, S. M. Shapiro, and A. Ito

Phys. Rev. Lett. 55, 2043 – Published 4 November 1985

Abstract

The low-temperature phase of the dilute Ising antiferromagnet ${Fe}_{0.55}$ ${Mg}_{0.45}$ ${Cl}_{2}$ in zero field is studied by specific-heat, ac-susceptibility, and neutron-scattering experiments. We find that in this phase, spin-glass behavior and antiferromagnetic long-range order coexist. Such a mixed-order phase is predicted by the mean-field theory of reentrant spin-glasses, but has never been observed before.

Received 13 May 1985

DOI:https://doi.org/10.1103/PhysRevLett.55.2043

Authors & Affiliations

Po-zen Wong¹, S. von Molnar², T. T. M. Palstra³, J. A. Mydosh³, H. Yoshizawa^4,*, S. M. Shapiro⁵, and A. Ito⁶

¹Schlumberger-Doll Research, Ridgefield, Connecticut 06877
²IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598
³Kamerlingh Onnes Laboratorium, der Rijks-Universiteit Leiden, Leiden, The Netherlands
⁴Institute for Solid State Physics, University of Tokyo, Roppongi, Minatoku, Tokyo 106, Japan
⁵Department of Physics, Brookhaven National Laboratory, Upton, New York 11973
⁶Department of Physics, Faculty of Science, Ochanomizu University, Bunkyo-ku, Tokyo 112, Japan