From Heavy Fermion and Spin-Glass Behavior to Magnetic Order in CeT_4M Compounds

• Authors: T. Toliński , A. Kowalczyk , M. Falkowski , K. Synoradzki , G. Chełkowska , A. Hoser , S. Rols
• Languages of publication: EN

Abstracts

EN

We report on the transitions between the ferromagnetic order, spin-glass behavior, heavy fermion and fluctuating valence state in a series of isostructural compounds CeT_4M (T = Ni, Cu; M = Al, Ga, Mn). The dilution of Ce or the T and M elements allowed us to follow the physical properties evolution employing the measurements of the heat capacity, dc magnetic susceptibility, frequency dependent ac magnetic susceptibility, magnetization relaxation, inelastic neutron scattering and also the X-ray photoemission spectroscopy. It is shown that the Mn rich compounds lean towards the spin glass behavior. For the compounds governed by the close to localization Ce 4f states the effect of the crystal electric field has been studied. It has been shown that the spin glass-like behavior can significantly influence the physics of the CeT_4M compounds.

Keywords

EN

71.20.Lp; 71.27.+a; 75.30.Mb; 75.30.Cr; 75.50.Lk; 78.70.Nx

Discipline

• 75.30.Cr: Saturation moments and magnetic susceptibilities
• 78.70.Nx: Neutron inelastic scattering
• 71.20.Lp: Intermetallic compounds
• 71.27.+a: Strongly correlated electron systems; heavy fermions
• 75.50.Lk: Spin glasses and other random magnets
• 75.30.Mb: Valence fluctuation, Kondo lattice, and heavy-fermion phenomena(see also 71.27.+a Strongly correlated electron systems, heavy fermions; for heavy-fermion superconductors, see 74.70.Tx)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 5-6
• Pages: 1014-1018

Dates

published

2012-05

Contributors

author

T. Toliński

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

author

A. Kowalczyk

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

author

M. Falkowski

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

author

K. Synoradzki

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

author

G. Chełkowska

• Institute of Physics, Silesian University, Katowice, Uniwersytecka 4, 40-007 Katowice, Poland

author

A. Hoser

• Helmholtz-Zentrum, Glienicker Straße 100, D-14109 Berlin, Germany

author

S. Rols

• Institut Laue Langevin, 6 rue Jules Horowitz, B.P. 156 F-38042, Grenoble Cedex 9, France

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Identifiers

DOI

10.12693/APhysPolA.121.1014