Spin fluctuations in (Ce,Y) CO/sub 2/ and related systems
The pseudobinary-alloy systems (Y/sub x/Zr/sub 1-x/)Co/sub 2/, (Y/sub x/Ce/sub 1-x/)Co/sub 2/, and (Ce/sub x/Zr/sub 1-x/)Co/sub 2/, for 0 < x < 1, were studied. The temperature dependence of the electrical resistivity, magnetic susceptibility, and specific heat were measured for these systems. The temperature ranges were: for the electrical resistivity 1.5 to 300 K, for the magnetic susceptibility 6 to 300 K, and for the specific heat 1.5 to 25 K. All three measurements show a rapid falloff of enhancements due to d-electron spin fluctuations as yttrium is replaced by zirconium in the (Y,Zr)Co/sub 2/ system. The variation of both the magnetic susceptibility and the specific heat as one substitutes cerium for yttrium in the (Y,Ce)Co/sub 2/ system is strikingly similar to that observed for (Y,Zr)Co/sub 2/. However, the resistivity of the (Y,Ce)Co/sub 2/ system is markedly different from that observed in (Y,Zr)Co/sub 2/. Measurements done on the (Ce,Zr)Co/sub 2/ system confirm both the similarities between CeCo/sub 2/ and ZrCo/sub 2/ seen in the magnetic susceptibility and specific heat and the difference seen in the resistivity. Of greatest interest to this study is the evolution of the curvature of the temperature-dependent magnetic susceptibility, which evolves from an upward bending form in YCo/sub 2/ to a downward bending form in both CeCo/sub 2/ and ZrCo/sub 2/ as predicted by theory.
- Research Organization:
- Temple Univ., Philadelphia, PA (USA)
- OSTI ID:
- 6409187
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ANGULAR MOMENTUM
CERIUM ALLOYS
COBALT ALLOYS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
SPECIFIC HEAT
SPIN
THERMODYNAMIC PROPERTIES
YTTRIUM ALLOYS
ZIRCONIUM ALLOYS