Ferromagnetism in the UCo1-xRuxAl quasiternary intermetallics / Andreev AV,Havela L,Sechovsky V,Bartashevich MI,Sebek J,Dremov RV,Kozlovskaya IK // PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES. - 1997. - V. 75, l. 6. - P. 827-844.

ISSN/EISSN:

0141-8637 / нет данных

Type:

Article

Abstract:

We report the structure and magnetic investigations of the quasiternary UCo1-xRuxAl compounds crystallizing in the hexagonal structure of the ZrNiAl type. A large deviation from linearity is observed in the concentration dependence of lattice parameters, positive for a and negative for c, whereas the unit-cell volume V obeys Vegard's law satisfactorily. The nonlinearity is explained by a preferential occupation by the Co and Ru atoms of the two non-equivalent positions of the transition metal in the lattice. Although UCoAl and URuAl are paramagnetic down to low temperatures, ferromagnetism is observed in a wide concentration range of quasiternary solid solutions UCo1-xRuxAl. Both the Curie temperature and the spontaneous magnetization reach their maximum values of 60 K and 0.6 eta(B) (formula unit)(-1) respectively in UCo0.7Ru0.3Al. The samples in the Ru concentration range 0.5 less than or equal to x less than or equal to 0.7 exhibit a second phase transition in the ordered state, indicated by anomalies in temperature dependence of both the spontaneous magnetization and the ac susceptibility. The development of magnetism is discussed in the framework of the anisotropic 5f-ligand hybridization and the direction dependent exchange interactions mediated by it.

Author keywords:

MAGNETIC-PROPERTIES; NEUTRON-DIFFRACTION; HYBRIDIZATION; SYSTEMS; UCOAL; X=AL; NI; GA

DOI:

10.1080/13642819708205710

Web of Science ID:

ISI:A1997XD50100004

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	JUN
Publisher	TAYLOR \& FRANCIS LTD
Address	ONE GUNPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE
Language	English
Keywords-Plus	MAGNETIC-PROPERTIES; NEUTRON-DIFFRACTION; HYBRIDIZATION; SYSTEMS; UCOAL; X=AL; NI; GA
Research-Areas	Materials Science; Mechanics; Physics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Mechanics; Physics, Applied; Physics, Condensed Matter
ResearcherID-Numbers	Sebek, Josef/G-6761-2014 Havela, Ladislav/K-4218-2017 Andreev, Alexander/B-6057-2011 Sechovsky, Vladimir/A-5256-2008
ORCID-Numbers	Havela, Ladislav/0000-0001-9801-7094 Sechovsky, Vladimir/0000-0003-1298-2120 Bartashevich, Mikhail/0000-0001-6853-2992
Number-of-Cited-References	27
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	14
Journal-ISO	Philos. Mag. B-Phys. Condens. Matter Stat. Mech. Electron. Opt. Magn. Prop.
Doc-Delivery-Number	XD501