Structure and Thermal Expansion of LiV{sub 2}O{sub 4} : Correlation between Structure and Heavy Fermion Behavior

Journal Article · Mon Dec 01 00:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.4866· OSTI ID:565232

Chmaissem, O; Jorgensen, J D ^[1]; Kondo, S; Johnston, D C ^[2]

---

1. Science and Technology Center for Superconductivity, and the Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)

The structural properties of the heavy fermion (HF) transition metal oxide LiV{sub 2}O{sub 4} have been studied as a function of temperature T from 4 to 295K. Upon cooling from 295K the lattice parameter a contracts gradually to become nearly constant between 65 and 20K and then decreases again below 20K. The downturn in a(T) below 20K correlates with the crossover from local moment to HF behavior. The thermal expansion is found to depend predominantly on the interatomic Li-O bonds while V-O bond lengths change only slightly. The electronic Grueneisen parameter at 7K is inferred to be large ({approximately}25), similar to low-T values of some f-electron HF compounds. {copyright} {ital 1997} {ital The American Physical Society}

• DOE Contract Number: W-31-109-ENG-38; W-7405-ENG-82
• OSTI ID: 565232
• Journal Information: Physical Review Letters, Vol. 79, Issue 24; Other Information: PBD: Dec 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
LITHIUM OXIDES
THERMAL EXPANSION
VANADIUM OXIDES
CRYSTAL STRUCTURE
TEMPERATURE DEPENDENCE
LATTICE PARAMETERS
BOND LENGTHS
GRUENEISEN CONSTANT
NEUTRON DIFFRACTION
INTERATOMIC DISTANCES