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Title: Phase transitions in K-doped MoO{sub 2}

K{sub 0.05}MoO{sub 2} has been studied by x-ray and neutron diffractometry, electrical resistivity, magnetization, heat capacity, and thermal expansion measurements. The compound displays two phase transitions, a first-order phase transition near room temperature and a second-order transition near 54 K. Below the transition at 54 K, a weak magnetic anomaly is observed and the electrical resistivity is well described by a power-law temperature dependence with exponent near 0.5. The phase transitions in the K-doped MoO{sub 2} compound have been discussed for the first time using neutron diffraction, high resolution thermal expansion, and heat capacity measurements as a function of temperature.
Authors:
; ;  [1] ; ; ;  [2] ;  [3]
  1. Departamento de Engenharia de Materiais, Escola de Engenharia de Lorena-USP, Lorena, São Paulo 12602-810 (Brazil)
  2. Department of Physics, Montana State University, P.O. Box 173840, Bozeman, Montana 59717-3840 (United States)
  3. NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Dr. MS 6102, Gaithersburg, Maryland 20899-6102 (United States)
Publication Date:
OSTI Identifier:
22304285
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DOPED MATERIALS; ELECTRIC CONDUCTIVITY; MAGNETIZATION; MOLYBDENUM OXIDES; NEUTRON DIFFRACTION; PHASE TRANSFORMATIONS; POTASSIUM ADDITIONS; RESOLUTION; SPECIFIC HEAT; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0273-0400 K; THERMAL EXPANSION; X RADIATION; X-RAY DIFFRACTION