Evidence of phase transitions in MoO2 single crystals
- Alves, L.M.S. [ Universidade de São Paulo, Escola de Engenharia de Lorena, 12602-810, Lorena, Brazil ]
- Oliveira, F.S. [ Universidade de São Paulo, Escola de Engenharia de Lorena, 12602-810, Lorena, Brazil ]
- de Lima, B.S. [ Universidade de São Paulo, Escola de Engenharia de Lorena, 12602-810, Lorena, Brazil ]
- da Luz, M.S. [ Universidade Federal do Triângulo Mineiro, Instituto de Ciências Exatas e Tecnológicas, 38064-200, Uberaba, Brazil ]
- Rebello, A. [ Montana State University: Physics ]
- Masunaga, S.H. [ Montana State University: Physics ]
- Neumeier, John J. [ Montana State University: Physics ]
- Giles, C. [ Instituto de FÃsica “Gleb Wataghinâ€, UNICAMP, Campinas, SP, C.P. 6165, 13083-970, Brazil ] [ Laboratório Nacional de Luz SÃncrotron, CP-6192, 13084-971, Campinas, SP, Brazil ]
- Leao, J.B. [ NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899-8562, USA ]
- dos Santos, C.A.M. [ Universidade de São Paulo, Escola de Engenharia de Lorena, 12602-810, Lorena, Brazil ]
In this work, structural and physical properties are revisited in the MoO2 compound. MoO2 single crystals have been prepared by chemical vapor transport technique and characterized by X-ray diffraction, neutron diffraction, high-resolution thermal expansion, electrical resistance measurements, and heat capacity. Electrical resistivity, heat capacity, and thermal expansion measurements show two clear features which are related to phase transitions on the MoO2 compound. These results suggest that an electronic-type transition occurs near 220 K and a structural transition at ∼267 K.