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Title: Design of a metallic Ising spin glass in the Y{sub 1-x}Tb{sub x}Ni{sub 2}Ge{sub 2} system

Design of a metallic Ising spin glass in the Y{sub 1-x}Tb{sub x}Ni{sub 2}Ge{sub 2} system There has been much interest in the past ten years in the effects of applying a transverse magnetic field on the freezing temperature of Ising spin glasses. The focus of this study is to search for and characterize a metallic Ising spin-glass system. This is accomplished by site diluting yttrium for terbium in the crystalline material TbNi{sub 2}Ge{sub 2}. Pure TbNi{sub 2}Ge{sub 2} is an Ising antiferromagnet with several distinct magnetic states below 17 K. As the terbium is diluted with yttrium, magnetic coupling and ordering temperatures are suppressed in a monotonic way, as is seen in measurements of the transition temperatures and analysis of the high-temperature Curie-Weiss behavior. At low concentrations of terbium, below x{approx}0.35, long-range order is no longer detected and a spin-glass-like state emerges. This state is studied through a variety of measurements: dc and ac susceptibility, resistivity, and specific heat. These data are then compared to that of other well characterized spin-glass systems. It is concluded that there is a region of concentrations for which an Ising spin-glass state is formed with the best spin glasses existing for x{<=}0.30.
Authors: ; ; ; ;
Publication Date:
OSTI Identifier:OSTI ID: 40205662
Resource Type:Journal Article
Resource Relation:Journal Name: Physical Review B; Journal Volume: 62; Journal Issue: 22; Other Information: Othernumber: PRBMDO000062000022015056000001; 021045PRB; PBD: 1 Dec 2000
Sponsoring Org:(US)
Country of Publication:United States
Language:English
Subject: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DESIGN; FREEZING; GLASS; MAGNETIC FIELDS; SPECIFIC HEAT; SPIN; TERBIUM; TRANSITION TEMPERATURE; YTTRIUM