Microstructure and magnetoresistance in La0.67Ca0.33Mn1-xVxO3 (x=0, 0.03, 0.06, 0.1, 0.15 and 0.25) compound

Gencer H., KOLAT V. S., ATALAY S.

JOURNAL OF ALLOYS AND COMPOUNDS, cilt.422, ss.40-45, 2006 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 422
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.jallcom.2005.12.005
  • Dergi Adı: JOURNAL OF ALLOYS AND COMPOUNDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.40-45
  • Anahtar Kelimeler: manganites, V substitution, colossal magnetoresistance, TRANSPORT-PROPERTIES, COLOSSAL MAGNETORESISTANCE, TRANSITION, METAL
  • İnönü Üniversitesi Adresli: Evet

Özet

The microstructure and magnetoresistance properties of the polycrystalline La0.67Ca0.3Mn1-xVxO3 were systematically investigated as a function of V-doping level. X-ray powder diffraction indicated that the substitution of Mn by V produced no structural change and only the diffraction lines for cubic perovskite were obtained for all samples. The detailed EDX analysis showed the existence of two phases in La0.67Ca0.3Mn1-xVxO3 (x = 0.03, 0.06, 0.1, 0.15 and 0.25) samples. The temperature dependence of resistance showed two maxima in the V-doped sample for x <= 0.15, and the peak value of magnetoresistance (MR) around insulator-metal transition temperature was increased with V-doping. Double maxima in the resistance-temperature curves were explained by the existence of two phases in La0.67Ca0.3Mn1-xVxO3 samples. (c) 2005 Elsevier B.V. All rights reserved.