High-field magnetostriction of TbCu, DyCu, and HoCu

Journal Article · Tue May 01 04:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.344771· OSTI ID:6838237

Ibarra, M R; Algarabel, P A ^[1]; Pavlovic, A S ^[2]

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1. Instituto de Ciencia de Materiales de Aragon, Zaragoza (Spain) Departamento de la Materia Condensada, Facultad de Ciencias, Universidad de Zaragoza, Zaragoza (Spain) Consejo Superior de Investigaciones Cientificas, 50009 Zaragoza, (Spain)
2. Department of Physics, West Virginia University, Morgantown, West Virginia 26506 (USA)

Preliminary results are presented on the anisotropic and volume magnetostriction in pulsed high magnetic fields (0--16.6 T) of the antiferromagnetic intermetallics TbCu, DyCu, and HoCu from room temperature to 5 K. The results clearly point out the relevance of these measurements in order to determine magnetic phase transitions induced by the magnetic field. The strain measured was surprisingly large, up to 10{sup {minus}3} for DyCu, which is the largest magnetostriction observed in an antiferromagnet. For TbCu below{approx}40 K, two distinct field-induced spin-reorientation transitions are exhibited at critical fields of {ital H}{sub {ital C}1}{approx}2 T and {ital H}{sub {ital C}2}{approx}8.5 T. This result casts doubt on the collinear nature of the magnetic structure of TbCu. From 50 to 5 K the DyCu results show two anomalies at critical fields {ital H}{sub {ital C}1}{approx}7.5 T and {ital H}{sub {ital C}2}{approx}11 T. In addition, these measurements show that at 11 K and below a small anomaly occurs at {ital H}{sub {ital C}3}{approx}2.5 T. HoCu exhibits a complex magnetostriction behavior, but it too presents definite anomalies at {ital H}{sub {ital C}1}{approx}2.5 T, {ital H}{sub {ital C}2}{approx}9 T, and {ital H}{sub {ital C}3}{approx}13 T. These results would point to a noncollinear magnetic structure for HoCu. All of the critical magnetic field values observed were practically temperature independent.

• OSTI ID: 6838237
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 67:9; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOY SYSTEMS
ALLOYS
ANISOTROPY
ANTIFERROMAGNETIC MATERIALS
BINARY ALLOY SYSTEMS
COPPER ALLOYS
DYSPROSIUM ALLOYS
HOLMIUM ALLOYS
LOW TEMPERATURE
MAGNETIC FIELDS
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MAGNETOSTRICTION
MATERIALS
MEDIUM TEMPERATURE
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PULSES
RARE EARTH ALLOYS
TERBIUM ALLOYS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE