Magnetic phase transitions in the UFe{sub 1{minus}{ital x}}Co{sub {ital x}}Al system

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.15907· OSTI ID:399815

Tran, V H; Troc, R; Zaleski, A J ^[1]; Vagizov, F G ^[2]; Drulis, H ^[1]

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1. W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-950 Wrocl/aw, P.O. Box 937 (Poland)
2. W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-950 Wrocl/aw, P.O. Box 937, Pol

We present the results of x-ray-powder diffraction, magnetic susceptibility, magnetization, electrical resistivity, and M{umlt o}ssbauer effect measurements performed on the UFe{sub 1{minus}{ital x}}Co{sub {ital x}}Al system. The lattice parameters determined for the system show a sharp maximum for {ital a}({ital x}) and minimum for {ital c}({ital x}) approximately for {ital x}{approx_equal}0.3. From the point of view of magnetic properties this system appears to have two main concentration regions: (a) 0{le}{ital x}{lt}0.5 and (b) 0.5{le}{ital x}{le}1.0. The phases falling into the first region do not show a long-range magnetic ordering, while in the second region they become ferromagnetic with the maximum values of the Curie temperature and spontaneous magnetic moment at {ital x}{approx_equal}0.8. The ferromagnetic properties of the alloys at {ital B}=0 T with 0.5{le}{ital x}{le}0.98 are also confirmed by the M{umlt o}ssbauer effect experiment. Furthermore, we compare the magnetic behavior of UFe{sub 1{minus}{ital x}}Co{sub {ital x}}Al with that of the analogous UFe{sub 1{minus}{ital x}}Ni{sub {ital x}}Al. We find that the maximum ferromagnetic response appears in both systems by introduction to them of approximately 0.8 or 1 more electron, i.e., for the {ital x}=0.8 and 0.5 compositions, respectively. Moreover, we discuss the complex magnetic properties of pure U-Co-Al in more details and some view on its ground state is given. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 399815
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 22 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM COMPOUNDS
COBALT COMPOUNDS
CRYSTAL STRUCTURE
CURIE POINT
ELECTRIC CONDUCTIVITY
ELECTRONIC STRUCTURE
IRON COMPOUNDS
MAGNETIC PROPERTIES
MOESSBAUER EFFECT
PHASE TRANSFORMATIONS
TEMPERATURE DEPENDENCE
URANIUM COMPOUNDS