Existence of a phase transition under finite magnetic field in the long-range RKKY Ising spin glass Dy${}_x$Y${}_{1-x}$Ru${}_2$Si${}_2$

Abstract

A phase transition of a model compound of the long-range Ising spin glass (SG) Dy${}_x$Y${}_{1-x}$Ru${}_2$Si${}_2$, where spins interact via the RKKY interaction, has been investigated. The static and the dynamic scaling analyses reveal that the SG phase transition in the model magnet belongs to the mean-field universality class. Moreover, the characteristic relaxation time in finite magnetic fields exhibits a critical divergent behavior as well as in zero field, indicating a stability of the SG phase in finite fields. The presence of the SG phase transition in field in the model magnet strongly syggests that the replica symmetry is broken in the long-range Ising SG.

arXiv comment4 pages, 4 figures, to be published in JPSJ (2010)

References in corpus (6)

• Absence of an Almeida-Thouless line in Three-Dimensional Spin Glasses
• Ising spin glass transition in magnetic field out of mean-field
• Observation of Spin Glass Dynamics in Dilute LiHo${}_x$Y${}_{1-x}$F${}_4$
• Absence of Conventional Spin-Glass Transition in the Ising Dipolar System LiHo_xY_{1-x}F_4
• Spin Glass Transition at Nonzero Temperature in a Disordered Dipolar Ising System: The Case of LiHoxY{1-x}F4
• Dynamical breakdown of the Ising spin-glass order under a magnetic field

Cited by in corpus (6)

• Thermodynamic glass transition in a spin glass without time-reversal symmetry
• The three dimensional Ising spin glass in an external magnetic field: the role of the silent majority
• Dynamical transition in the D = 3 Edwards-Anderson spin glass in an external magnetic field
• Experimental Phase Diagram and Dynamics of a Dilute Dipolar-Coupled Ising System
• Dynamic scaling analysis of the long-range RKKY Ising spin glass Dy${}_x$Y${}_{1-x}$Ru${}_2$Si${}_2$
• Critical Phenomena in Long-Range RKKY Ising Spin Glasses