CeCo sub 0. 89 Ge sub 2 : A heavy-fermion system

Journal Article · Mon Apr 01 00:00:00 EST 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.8238· OSTI ID:5625172

Pecharsky, V K; Gschneidner, Jr, K A ^[1]

---

1. Ames Laboratory, Iowa State University, Ames, Iowa 50011 (USA) Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011 (USA)

The low-temperature (1.3--20 K) high-magnetic-field (0--10 T) heat capacity and magnetic susceptibility (1.5--300 K) of the CeCo{sub 0.89}Ge{sub 2} and LaCo{sub 0.96}Ge{sub 2} compounds have been measured. LaCo{sub 0.96}Ge{sub 2} exhibits normal metallic behavior, while the cerium-containing compound shows (1) an enhanced value of zero-field electronic-specific-heat coefficient ({gamma}=128 mJ/mol(Ce) K{sup 2}), which increases significantly in high magnetic fields; (2) the absence of magnetic ordering down to 1.5 K; (3) a large and negative value of paramagnetic Curie temperature ({minus}95.9 K); and (4) a large magnetic susceptibility at low temperature (9{times}10{sup {minus}3} emu/mol at 1.7 K). All of these properties are evidence of high density of states at the Fermi level in CeCo{sub 0.89}Ge{sub 2}. Neither compound is superconducting down to 1.3 K, nor do they order magnetically.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5625172
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 43:10; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM ALLOYS
MAGNETIC SUSCEPTIBILITY
SPECIFIC HEAT
COBALT ALLOYS
GERMANIUM BASE ALLOYS
LANTHANUM ALLOYS
ENERGY-LEVEL DENSITY
FERMI LEVEL
FERMIONS
LOW TEMPERATURE
MAGNETIC FIELDS
MEDIUM TEMPERATURE
ORDER-DISORDER TRANSFORMATIONS
PARAMAGNETISM
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
ALLOYS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY LEVELS
GERMANIUM ALLOYS
MAGNETIC PROPERTIES
MAGNETISM
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
THERMODYNAMIC PROPERTIES
360104* - Metals & Alloys- Physical Properties