title: Structure and magnetism in LaCoO3.
abstract: The temperature dependence of the hexagonal lattice parameter c of single crystal LaCoO3(LCO) with H = 0 and 800 Oe, as well as LCO bulk powders with H = 0, was measured using high-resolution x-ray scattering near the transition temperature To ≈35 K. The change of c(T) is well characterized by a power law in T − To for T>To and by a temperature independent constant for T<To when convoluted with a Gaussian function of width 8.5 K. This behavior is discussed in the context of the unusual magnetic behavior observed in LCO as well as recent generalized gradient approximation calculations.
authors.affiliation: Department of Physics, University of California, Santa Cruz, CA 95064, USA.
authors.forename: D P
authors.initials: DP
authors.lastname: Belanger
authors.forename: T
authors.initials: T
authors.lastname: Keiber
authors.forename: F
authors.initials: F
authors.lastname: Bridges
authors.forename: A M
authors.initials: AM
authors.lastname: Durand
authors.forename: A
authors.initials: A
authors.lastname: Mehta
authors.forename: H
authors.initials: H
authors.lastname: Zheng
authors.forename: J F
authors.initials: JF
authors.lastname: Mitchell
authors.forename: V
authors.initials: V
authors.lastname: Borzenets