Moessbauer spectra study of Nd sub 2 Fe sub 14 minus x Ga sub x B and Nd sub 2 Fe sub 11. 5 minus x Co sub 2. 5 Ga sub x B compounds

Journal Article · Mon Oct 15 00:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.346210· OSTI ID:6334890

Xie, J Q; Wu, C H; Chuang, Y C ^[1]; Yang, F M ^[2]

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1. Institute of Metal Research, Academia Sinica, Shenyang (People's Republic of China)
2. Institute of Physics, Academia Sinica, Beijing (People's Republic of China)

A Moessbauer study of Nd{sub 2}Fe{sub 14{minus}{ital x}}Ga{sub {ital x}}B and Nd{sub 2}Fe{sub 11.5{minus}{ital x}}Co{sub 2.5}Ga{sub {ital x}}B confirmed that, in Nd{sub 2}Fe{sub 14{minus}{ital x}}Ga{sub {ital x}}B with {ital x}{lt}1, preferential occupation of the {ital k}{sub 2} site by Ga atoms occurs, and that when {ital x}{ge}1, Ga atoms preferentially occupy the {ital k}{sub 1} as well as {ital j}{sub 1} sites in addition to the {ital k}{sub 2} sites. In Nd{sub 2}Fe{sub 11.5{minus}{ital x}}Co{sub 2.5}Ga{sub {ital x}}B, the Ga atoms preferentially occupy the {ital j}{sub 2} site, and also appear at the {ital j}{sub 1} sites when {ital x}{ge}1. Based on these findings, the different effect of Ga on the Curie temperature in these two compound series can be interpreted satisfactorily. The fact that in these compound series the {ital a} axis is little changed whereas the {ital c} axis remarkably increases with increasing Ga substitution can also be explained.

• OSTI ID: 6334890
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 68:8; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANISOTROPY
BORIDES
BORON COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
COBALT BORIDES
COBALT COMPOUNDS
COHERENT SCATTERING
CURIE POINT
DIFFRACTION
GALLIUM BROMIDES
GALLIUM COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IRON BORIDES
IRON COMPOUNDS
MAGNETIC PROPERTIES
MOESSBAUER EFFECT
NEODYMIUM BORIDES
NEODYMIUM COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION