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Structural and Magnetic Properties of Low D Content YMn2 Deuteride

✍ Scribed by M. Latroche; V. Paul-Boncour; A. Percheron-Guégan; F. Bourée-Vigneron; G. André

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
202 KB
Volume
154
Category
Article
ISSN
0022-4596

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✦ Synopsis

The structural and magnetic properties of YMn 2 D 1.15 have been investigated by temperature-dependent neutron di4raction. Magnetic and deuterium orders appear below T c ‫؍‬ 217 K. To separate both e4ects and to study only magnetic ordering, hydrogen atom contribution was cancelled by preparing the compound YMn 2 (H 0.64 D 0.36 ) 1.15 . A noncollinear magnetic structure with 3.1 B /Mn is observed. Finally the low-temperature structure was fully solved taking into account both deuterium and magnetic contributions. Whereas the deuterium atoms are randomly distributed over all the 96g sites (Fd3 m) above 217 K, only 12i sites in space group P4 3m are occupied at low temperature.

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