Structure and disorder in YbInCu{sub 4}

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.6011· OSTI ID:383227

Lawrence, J M ^[1]; Kwei, G H ^[2]; Sarrao, J L; Fisk, Z ^[3]; Mandrus, D; Thompson, J D ^[4]

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1. University of California, Irvine, California 92697-4575 (United States)
2. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
3. Florida State University, Tallahassee, Florida 32306 (United States)
4. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

We present neutron diffraction results for YbInCu{sub 4}, and Rietveld refinements of the structure. The ground state has the same structure (C15B) as the high temperature state, so that the first-order phase transition at {ital T}{sub {ital s}}=40 K is indeed isomorphic, i.e., the lattice constant changes without a change of crystal symmetry. The site disorder and the diffraction linewidths decrease systematically on going from polycrystal samples with two transitions (at 40 and 70 K) to polycrystals with a single (40 K) transition to flux-grown single crystals with a sharp transition at 40 K. We argue that in site-disordered samples, the effect of doping Yb onto the In site is to increase {ital T}{sub {ital s}} and cause the transition to become continuous. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Los Alamos National Laboratory
• DOE Contract Number: W-7405-ENG-36; W-7405-ENG-48
• OSTI ID: 383227
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 9 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER OXIDES
CRYSTAL STRUCTURE
INDIUM COMPOUNDS
MAGNETIC SUSCEPTIBILITY
NEUTRON DIFFRACTION
PHASE TRANSFORMATIONS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 13-65 K
TEMPERATURE RANGE 65-273 K
YTTERBIUM COMPOUNDS