Magnetic and electrical properties of La0.67Ca0.33Mn0.9V0.1O3 two-phase composite

✍ Scribed by V.S. Kolat; H. Gencer; S. Atalay

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 493 KB
• Volume: 371
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2005.09.036

✦ Synopsis

In this work, we present magnetic and electrical properties of La 0.67 Ca 0.33 Mn 1Àx V x O 3 (x ¼ 0 and 0.1). Polycrystalline La 0.67 Ca 0.33 MnO 3 and La 0.67 Ca 0.33 Mn 0.9 V 0.1 O 3 samples were prepared by conventional solid-state reaction. Two Curie temperatures for the La 0.67 Ca 0.33 Mn 0.9 V 0.1 O 3 sample were observed at T c1 ¼ 223 K and T c2 ¼ 190 K. The undoped La 0.67 Ca 0.33 MnO 3 sample showed only one magnetic transition temperature at 267 K. The temperature dependence of resistance showed two maxima in the V-doped sample, and the peak value of magnetoresistance (MR) around the Curie temperature increased with V doping. Double maxima in the resistance-temperature and magnetisation-temperature curves are explained by the existence of two phases in La 0.67 Ca 0.33 Mn 0.9 V 0.1 O 3 samples.