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Title: Magnetic properties and crystal structure of RENiA1 and UniA1 hydrides.

Abstract

RENiAl (RE = rare-earth metal) and UNiAl compounds crystallizing in the hexagonal ZrNiAl-type structure (space group P{bar 6}2m) can absorb up to 2 and 3 hydrogen (deuterium) atoms per formula unit, respectively. Hydrogenation leads to a notable lattice expansion and modification of magnetic properties. However, the impact of hydrogenation on magnetism is the opposite for 4f- and 5f-materials: TN(T{sub c})is lowered in the case of rare-earth hydrides, while for UNiAlH(D){sub x} it increases by an order of magnitude. Here we present results of magnetic and structure studies performed of these compounds, focusing on the correlation between magnetic and structural variations and discussing possible reasons of the striking difference in effect of hydrogenation on rare-earth and actinide intermetallics.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
11924
Report Number(s):
ANL/IPNS/CP-99744
TRN: AH200119%%212
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 44th Annual Conference on Magnetism and Magnetic Materials, San Jose, CA (US), 11/15/1999--11/18/1999; Other Information: PBD: 11 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 36 MATERIALS SCIENCE; ACTINIDES; ATOMS; CRYSTAL STRUCTURE; DEUTERIUM; HYDRIDES; HYDROGEN; HYDROGENATION; MAGNETIC MATERIALS; MAGNETIC PROPERTIES; MAGNETISM

Citation Formats

Bordallo, H. N., Drulis, H., Havela, L., Iwasieczko, W., Kolomiets, A. V., Nakotte, H., Refaja, D., and Yartys, V. A. Magnetic properties and crystal structure of RENiA1 and UniA1 hydrides.. United States: N. p., 1999. Web.
Bordallo, H. N., Drulis, H., Havela, L., Iwasieczko, W., Kolomiets, A. V., Nakotte, H., Refaja, D., & Yartys, V. A. Magnetic properties and crystal structure of RENiA1 and UniA1 hydrides.. United States.
Bordallo, H. N., Drulis, H., Havela, L., Iwasieczko, W., Kolomiets, A. V., Nakotte, H., Refaja, D., and Yartys, V. A. Wed . "Magnetic properties and crystal structure of RENiA1 and UniA1 hydrides.". United States. https://www.osti.gov/servlets/purl/11924.
@article{osti_11924,
title = {Magnetic properties and crystal structure of RENiA1 and UniA1 hydrides.},
author = {Bordallo, H. N. and Drulis, H. and Havela, L. and Iwasieczko, W. and Kolomiets, A. V. and Nakotte, H. and Refaja, D. and Yartys, V. A.},
abstractNote = {RENiAl (RE = rare-earth metal) and UNiAl compounds crystallizing in the hexagonal ZrNiAl-type structure (space group P{bar 6}2m) can absorb up to 2 and 3 hydrogen (deuterium) atoms per formula unit, respectively. Hydrogenation leads to a notable lattice expansion and modification of magnetic properties. However, the impact of hydrogenation on magnetism is the opposite for 4f- and 5f-materials: TN(T{sub c})is lowered in the case of rare-earth hydrides, while for UNiAlH(D){sub x} it increases by an order of magnitude. Here we present results of magnetic and structure studies performed of these compounds, focusing on the correlation between magnetic and structural variations and discussing possible reasons of the striking difference in effect of hydrogenation on rare-earth and actinide intermetallics.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}

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