Crystal fields and Kondo effect: Specific heat for Cerium compounds

The magnetic properties of praseodymium metal are interpreted in term s of a simple model suggested by the crystal structure where alternate layers of ions are subjected to crystal fields of face-centred cubic and hexagonal symmetry. The crystal field parameters are found by fitting the magnetic specific heat anomaly, and the variation of the susceptibility with temperature can be explained using a two-parameter molecular field model. The exchange intemaction is predominantly ferromagnetic in sign. The origin of the hyperfine specific heat is discussed, and attributed to interaction effects, though these must be larger than can be accounted for by simple theoretical estimates.

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Competition between magnetic order and Kondo effect in cerium compounds

Journal of Magnetism and Magnetic Materials ◽

10.1016/s0304-8853(00)00762-9 ◽

2001 ◽

Vol 226-230 ◽

pp. 115-117 ◽

Cited By ~ 9

Author(s):

B Coqblin ◽

M.A Gusmão ◽

J.R Iglesias ◽

A.R Ruppenthal ◽

C Lacroix

Keyword(s):

Kondo Effect ◽

Magnetic Order ◽

Cerium Compounds

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Competition between Kondo effect and RKKY interactions in heavy-fermion systems: Specific heat

Physical Review B ◽

10.1103/physrevb.56.3145 ◽

1997 ◽

Vol 56 (6) ◽

pp. 3145-3148 ◽

Cited By ~ 2

Author(s):

Ashwani Kumar ◽

P. K. Ahluwalia ◽

S. Kumar ◽

K. C. Sharma

Keyword(s):

Specific Heat ◽

Heavy Fermion ◽

Kondo Effect ◽

Fermion Systems ◽

Heavy Fermion Systems

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Crystal fields and the Kondo effect in dilute cerium alloys

Canadian Journal of Physics ◽

10.1139/p77-081 ◽

1977 ◽

Vol 55 (6) ◽

pp. 589-591 ◽

Cited By ~ 2

Author(s):

R. Harris ◽

M. J. Zuckermann

Keyword(s):

Low Temperature ◽

Kondo Effect ◽

Magnetic Impurity ◽

Crystal Fields ◽

Temperature Susceptibility

We give simple expressions for the low temperature susceptibility of cubic and hexagonal Kondo alloys containing cerium as the magnetic impurity. We fit our expressions to data for cubic La-Ce and cubic (La-Ce)Al2, and to measurements of the parallel susceptibility in hexagonal Y-Ce.

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