Kondo Effect in 3d-host Ferromagnetic Sm1-xCexMn2Ge2

Journal Article · Sun Jan 01 04:00:00 EST 2006 · Journal of Alloys and Compounds

DOI:https://doi.org/10.1016/j.jallcom.2005.06.075· OSTI ID:930488

Liang, G; Yao, Q; Xi, H; Mochizuki, K; Markert, J; Croft, M

Lattice, Ce L{sub 3}-edge, magnetic susceptibility, and electrical resistivity results on polycrystalline Sm{sub 1-x}Ce{sub x}Mn{sub 2}Ge{sub 2} (0 {<=} x {<=} 1) compound series are presented. The lattice parameters a and c increase almost linearly with the increase of Ce concentration x. The Ce-L{sub 3} X-ray absorption spectra indicate that the Ce in this series is nearly trivalent, and Ce valence decreases slightly with the increase of Ce concentration x. Magnetic susceptibility results indicate that the antiferromagnetic (AF) phase in the re-entrant ferromagnetic compound, SmMn{sub 2}Ge{sub 2}, is completely destroyed by merely 1.1% Ce for Sm substitution. For x > 0.011, only ferromagnetic (FM) phases exist below room temperature. It is found that in these materials Ce Kondo scattering coexists with the 3d-host FM fields and is also effectively weakened by such fields.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 930488
• Report Number(s): BNL--80389-2008-JA
• Journal Information: Journal of Alloys and Compounds, Journal Name: Journal of Alloys and Compounds Journal Issue: 1-2 Vol. 414; ISSN 0925-8388; ISSN JALCEU
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM ALLOYS
ELECTRIC CONDUCTIVITY
GERMANIUM ALLOYS
KONDO EFFECT
LATTICE PARAMETERS
MAGNETIC SUSCEPTIBILITY
MANGANESE ALLOYS
PHASE STUDIES
SAMARIUM ALLOYS
national synchrotron light source