The structural and magnetic properties in vanadium dioxide (V O2) nanorods prepared by the hydrothermal treatment are shown to be markedly different from the case of the bulk system. A peculiar mixed phase of an insulating monoclinic structure (M2) that is observed in the bulk systems under doping or stress and a rutile (R) structure was revealed and confirmed by transmission electron microscopy, x-ray diffraction, and electron spin resonance measurements. Besides, a broad transition from a high-temperature magnetic phase to a low-temperature one, with quite distinct magnetic correlation strengths, was observed.
Bibliographical noteFunding Information:
This work was supported by the Korea Science and Engineering Foundation (User Program of Proton Engineering Frontier Project and M60504000021-05B0400-02110) and by the Korea Research Foundation (Grant No. KRF-2004-005-C00060 and the Second Brain Korea 21 Project). This work was also supported by the Seoul Research and Business Development Program (Grant No. 10583). The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)