Magnetism in a UNi2/3Rh1/3Al single crystal / Andreev AV,Sechovsky V,Prokes K,Homma Y,Syshchenko O,Sebek J,Bartashevich MI,Goto T,Shiokawa Y,Jurek K // PHILOSOPHICAL MAGAZINE. - 2003. - V. 83, l. 13. - P. 1613-1630.

ISSN/EISSN:

1478-6443 / нет данных

Type:

Article

Abstract:

We report a magnetization, magnetostriction, electrical resistivity, specific heat and neutron scattering study of a UNi2/3Rh1/3Al single crystal, a solid solution of an antiferromagnet UNiAl and a ferromagnet URhAl. The huge uniaxial magnetic anisotropy confining the principal magnetic response to the e axis in the parent compounds persists also, for the solid solution. The magnetization curve at 1.6 K has a pronounced S shape with an inflection at 12 T. The temperature dependence of magnetic susceptibility exhibits a maximum around 10 K and is magnetic history dependent at lower temperatures where the resistivity increases linearly with decreasing temperature. The low-temperature rho(T) anomaly is removed in a magnetic field applied along e, which yields a large negative magneto resistance amounting to -46 muOmega in 14 T (at 2 K). The C/T values exhibit a minimum around 12 K and below 8 K they become nearly constant (about 250 mJ mol(-1) K-2), which is strongly affected by magnetic fields. Neutron scattering data confirm a nonmagnetic ground state of UNi2/3Rh1/3Al. The bulk properties at low temperatures are tentatively attributed to the freezing of U magnetic, moments with antiferromagpetic correlations. The additional intensities detected on top of nuclear reflections in neutron diffraction in a magnetic field applied along c are found to be proportional to the field-induced -magnetization, which reflects field-induced ferromagnetic coupling of U magnetic moments. This scenario is corroborated also by finding low-temperature magnetostriction data that also scale with the square of magnetization.

Author keywords:

INTERMETALLIC COMPOUNDS; METAMAGNETISM; PRESSURE; ACTINIDE; URANIUM; UCOAL

DOI:

10.1080/1478643031000094730

Web of Science ID:

ISI:000182664500006

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	MAY 1
Publisher	TAYLOR \& FRANCIS LTD
Address	4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
Language	English
Keywords-Plus	INTERMETALLIC COMPOUNDS; METAMAGNETISM; PRESSURE; ACTINIDE; URANIUM; UCOAL
Research-Areas	Materials Science; Metallurgy \& Metallurgical Engineering; Physics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Metallurgy \& Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter
ResearcherID-Numbers	Sebek, Josef/G-6761-2014 Andreev, Alexander/B-6057-2011 Sechovsky, Vladimir/A-5256-2008 Jurek, Karel/G-7923-2014
ORCID-Numbers	Sechovsky, Vladimir/0000-0003-1298-2120 Bartashevich, Mikhail/0000-0001-6853-2992
Number-of-Cited-References	25
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	10
Journal-ISO	Philos. Mag.
Doc-Delivery-Number	674YE