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

Journal Article · Fri Dec 01 04:00:00 EST 2000 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.62.15056· OSTI ID:40205662

Wiener, T A; Fisher, I R; Bud'ko, S L; Kracher, A; Canfield, P C

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.

• Sponsoring Organization: (US)
• OSTI ID: 40205662
• Journal Information: Physical Review B, Journal Name: Physical Review B Journal Issue: 22 Vol. 62; ISSN 0163-1829
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DESIGN
FREEZING
GLASS
MAGNETIC FIELDS
SPECIFIC HEAT
SPIN
TERBIUM
TRANSITION TEMPERATURE
YTTRIUM