Magnetoresistance and magnetization of melt-spun Dy-Cu alloys

Journal Article · Mon Sep 01 00:00:00 EDT 1997 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.619499· OSTI ID:566378

Mueller, K H; Idzikowski, B; Eckert, D; Nenkov, K; Engelmann, H J; Teresiak, A; Wolf, M ^[1]

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1. Inst. fuer Festkoerper- und Werkstofforschung Dresden (Germany)

At low temperatures melt-spun and subsequently annealed ribbons with the nominal composition Dy{sub x}Cu{sub 100{minus}x} (x < 20) show a remarkable magnetoresistance ratio which is negative and isotropic. This effect is caused by the cubic DyCu{sub 5} phase with the AuBe{sub 5}-type structure. Below a critical temperature T{sub m} {approx} 7K this phase is metamagnetic. Between T{sub m} and {Tc} {approx} 14.5K it shows a spontaneous magnetization, i.e., it is ferromagnetic. The hexagonal DyCu{sub 7} phase (TbCu{sub 7}-type structure) is ferromagnetic with a Curie temperature of about 18K. This 1:7 phase as well as the lamellar Cu/DyCu{sub 5} microstructure caused by the eutectoid decomposition of DyCu{sub 7} do not result in a large magnetoresistance of the ribbons.

• OSTI ID: 566378
• Report Number(s): CONF-970468--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 5Pt2 Vol. 33; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER BASE ALLOYS
DYSPROSIUM ALLOYS
EXPERIMENTAL DATA
MAGNETIZATION
MAGNETORESISTANCE
TEMPERATURE DEPENDENCE