Phase transitions in K-doped MoO{sub 2}

Journal Article · Wed May 28 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4879096· OSTI ID:22304285

Alves, L. M. S.,; Lima, B. S. de; Rebello, A.; Masunaga, S. H.; Neumeier, J. J. ^[1]; Leão, J. B. ^[2]

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1. Department of Physics, Montana State University, P.O. Box 173840, Bozeman, Montana 59717-3840 (United States)
2. NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Dr. MS 6102, Gaithersburg, Maryland 20899-6102 (United States)

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.

• OSTI ID: 22304285
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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