Magnetic properties of Nd sub 2 CuO sub 4 -type R sub 2 CuO sub 4 ( R =Y, Dy, Ho, Er, Tm) synthesized under high pressure: Weak ferromagnetism of Y sub 2 CuO sub 4

Journal Article · Mon Oct 01 04:00:00 EDT 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.42.6813· OSTI ID:6000001

Okada, H ^[1]; Takano, M ^[2]; Takeda, Y ^[3]

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1. Materials Research Laboratory, Kobe Steel, Ltd., Kobe (Japan)
2. Institute for Chemical Research, Kyoto University, Uji, Kyoto-fu (Japan)
3. Faculty of Engineering, Mie University, Tsu (Japan)

Magnetization of {ital R}{sub 2}CuO{sub 4} ({ital R}=Y, Dy, Ho, Er, Tm) crystallizing in the Nd{sub 2}CuO{sub 4}-type ({ital T}{prime}) structure has been measured between 4 and 300 K. In Y{sub 2}CuO{sub 4} antiferromagnetic ordering of Cu{sup 2+} spins at 260 K has been detected clearly, without being interfered with by the paramagnetic contribution of rare-earth elements as in the other compositions. Weak ferromagnetic behavior with a moment of 9{times}10{sup {minus}4} {mu}{sub {ital B}}/Cu accompanies the antiferromagnetic transition. Dy{sup 3+}, Ho{sup 3+}, Er{sup 3+}, and Tm{sup 3+} ions obey the Curie-Weiss law at relatively high temperatures, and the effective moments are in good agreement with the values anticipated from their lowest multiplet levels. Various types of deviations from the law occur at low temperatures. Specifically, a sharp kink possibly suggesting antiferromagnetic ordering of the Dy{sup 3+} moments has been found at 7 K. Anomalies around 200 K for Ho{sub 2}CuO{sub 4} and Er{sub 2}CuO{sub 4} reflect the weak ferromagnetic contribution of the CuO{sub 2} lattice.

• OSTI ID: 6000001
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:10; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANTIFERROMAGNETISM
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CURIE-WEISS LAW
DYSPROSIUM COMPOUNDS
DYSPROSIUM OXIDES
ERBIUM COMPOUNDS
ERBIUM OXIDES
FERROMAGNETISM
HOLMIUM COMPOUNDS
HOLMIUM OXIDES
LOW TEMPERATURE
MAGNETISM
MAGNETIZATION
MEDIUM TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
THULIUM COMPOUNDS
THULIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
VERY HIGH PRESSURE
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES