Specific heat of Ce[sub 1[minus][ital x]M[ital x]]Cu[sub 6] ([ital M]=La, Th, Y, and Pr)

Journal Article · Sat Jan 01 00:00:00 EST 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.327· OSTI ID:5437927

Kim, J S; Stewart, G R ^[1]

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1. Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)

Ce[sub 1[minus][ital x]]La[sub [ital x]]Cu[sub 6] is known to have a [gamma] [[equivalent to][ital C]/[ital T] ([ital T][r arrow]0)] per Ce mole that [ital increases] monotonically with increasing La concentration: [gamma] of Ce[sub 0.1]La[sub 0.9]Cu[sub 6] is [similar to]2.3 J/Ce mole K[sup 2] while that for pure CeCu[sub 6] is only 1.6 J/Ce mole K[sup 2]. To investigate this behavior, unusual in comparison with, e.g., UBe[sub 13] or CeCu[sub 2]Si[sub 2], the properties (including specific heat to 0.4 K, dc susceptibility to 1.8 K, and resistivity) of Ce[sub 1[minus][ital x]M[ital x]]Cu[sub 6], [ital M]=La, Th, Y, and Pr, 0[le][ital x][le]1, have been investigated, with the most extensive work being on La and Th. [chi] (1.8 K) remains essentially constant to [ital x]=0.4 for Th and La doping, and then rises (falls) for further La (Th) doping, with values for [ital x]=0.1 of 45.7 memu/Ce mole for La and 19.3 memu/Ce mole for Th versus 36.7 memu/mole for pure CeCu[sub 6]. While the specific-heat [gamma] values, as previously reported, increase essentially linearly upon increasing La doping, the [gamma] values for Th doping remain essentially constant up to [ital x]=0.4, and then [ital decrease] monotonically upon further Th doping, reaching [gamma]=500 mJ/Ce mole K[sup 2] for [ital x]=0.9.

• DOE Contract Number: FG05-86ER45268
• OSTI ID: 5437927
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 49:1; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

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YTTRIUM ALLOYS
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MAGNETIC SUSCEPTIBILITY
TEMPERATURE RANGE 0000-0013 K
TERNARY ALLOY SYSTEMS
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