Magnetic Phase Transition in V2O3 Nanocrystals

Blagojevic, V; Carlo, J; Brus, L; Steigerwald, M; Uemura, Y; Billinge, S; Zhou, W; Stephens, P; Aczel, A; Luke, G

Title: Magnetic Phase Transition in V2O3 Nanocrystals

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Abstract

V{sub 2}O{sub 3} nanocrystals can be synthesized through hydrothermal reduction in VO(OH){sub 2} using hydrazine as a reducing agent. Addition of different ligands to the reaction produces nanoparticles, nanorods, and nanoplatelets of different sizes. Small nanoparticles synthesized in this manner show suppression of the magnetic phase transition to lower temperatures. Using muon spin relaxation spectroscopy and synchrotron x-ray diffraction, we have determined that the volume fraction of the high-temperature phase, characterized by a rhombohedral structure and paramagnetism, gradually declines with decreasing temperature, in contrast to the sharp transition observed in bulk V{sub 2}O{sub 3}.

Authors:: Blagojevic, V; Carlo, J; Brus, L; Steigerwald, M; Uemura, Y; Billinge, S; Zhou, W; Stephens, P; Aczel, A; Luke, G

Publication Date:: Sat Dec 31 00:00:00 EST 2011

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE SC OFFICE OF SCIENCE (SC)

OSTI Identifier:: 1042117

Report Number(s):: BNL-97795-2012-JA
TRN: US1202743

DOE Contract Number:: DE-AC02-98CH10886

Resource Type:: Journal Article

Journal Name:: Physical Review. B, Condensed Matter and Materials Physics

Additional Journal Information:: Journal Volume: 82; Journal Issue: 9

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; HYDRAZINE; MUON SPIN RELAXATION; PARAMAGNETISM; REDUCING AGENTS; SPECTROSCOPY; SYNCHROTRONS; X-RAY DIFFRACTION

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                    Blagojevic, V, Carlo, J, Brus, L, Steigerwald, M, Uemura, Y, Billinge, S, Zhou, W, Stephens, P, Aczel, A, and Luke, G. Magnetic Phase Transition in V2O3 Nanocrystals.  United States: N. p., 2011. 
        Web.

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                    Blagojevic, V, Carlo, J, Brus, L, Steigerwald, M, Uemura, Y, Billinge, S, Zhou, W, Stephens, P, Aczel, A, & Luke, G. Magnetic Phase Transition in V2O3 Nanocrystals.  United States.

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                    Blagojevic, V, Carlo, J, Brus, L, Steigerwald, M, Uemura, Y, Billinge, S, Zhou, W, Stephens, P, Aczel, A, and Luke, G. 2011.  
        "Magnetic Phase Transition in V2O3 Nanocrystals".  United States.

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@article{osti_1042117,

  title        = {Magnetic Phase Transition in V2O3 Nanocrystals},

  author       = {Blagojevic, V and Carlo, J and Brus, L and Steigerwald, M and Uemura, Y and Billinge, S and Zhou, W and Stephens, P and Aczel, A and Luke, G},

  abstractNote = {V{sub 2}O{sub 3} nanocrystals can be synthesized through hydrothermal reduction in VO(OH){sub 2} using hydrazine as a reducing agent. Addition of different ligands to the reaction produces nanoparticles, nanorods, and nanoplatelets of different sizes. Small nanoparticles synthesized in this manner show suppression of the magnetic phase transition to lower temperatures. Using muon spin relaxation spectroscopy and synchrotron x-ray diffraction, we have determined that the volume fraction of the high-temperature phase, characterized by a rhombohedral structure and paramagnetism, gradually declines with decreasing temperature, in contrast to the sharp transition observed in bulk V{sub 2}O{sub 3}.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/1042117},
  journal      = {Physical Review. B, Condensed Matter and Materials Physics},
number       = 9,

  volume       = 82,

  place        = {United States},

  year         = {Sat Dec 31 00:00:00 EST 2011},

  month        = {Sat Dec 31 00:00:00 EST 2011}

}

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