Crystal and magnetic structures of LaNi5−xMnx

The crystallographic and magnetic properties of LaNi5−xMnx with x=1, 1.5, and 2, have been investigated using x-ray and neutron diffraction, vibrating sample magnetometer and superconducting quantum interference device measurements. All the samples crystallize in the hexagonal CaCu5-type (P6/mmm) st...

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Bibliographic Details
Published in:Journal of applied physics 2000-05, Vol.87 (9), p.6731-6733
Main Authors: Tai, C. Y., Marasinghe, G. K., Pringle, O. A., James, W. J., Chen, M., Yelon, W. B., Dubenko, I., Ali, N., I’Héritier, Ph
Format: Article
Language:English
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Summary:The crystallographic and magnetic properties of LaNi5−xMnx with x=1, 1.5, and 2, have been investigated using x-ray and neutron diffraction, vibrating sample magnetometer and superconducting quantum interference device measurements. All the samples crystallize in the hexagonal CaCu5-type (P6/mmm) structure. Manganese atoms preferentially occupy the 3g site in the LaNi5 structure. The bulk magnetization of the LaNi5−xMnx powder samples decreases rapidly as nickel is replaced by manganese. A ferrimagnetic model is applied to describe the magnetic structure of the LaNi5−xMnx samples for x=1.5 and 2. A ferromagnetic model gives the best fit of the neutron diffraction data for the LaNi4Mn sample.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.372823