Effects of dilution on magnetic and transport properties ofLa0.7Ca0.3Mn1−xMx′O3

  title={Effects of dilution on magnetic and transport properties ofLa0.7Ca0.3Mn1−xMx′O3},
  author={Dao Nguyen Hoai Nam and H. S. Hong and Nguyen Van Khien and Nguyen Van Dai and Tran Dang Thanh and Le Thi Cat Tuong and L{\^e} Văn Hồng and Nguyen Xuan Phuc},
  journal={Physical Review B},
  • D. Nam, H. Hong, +5 authors N. Phuc
  • Published 14 April 2008
  • Materials Science, Physics
  • Physical Review B
Magnetic and transport properties of La0.7 Ca0.3 Mn1-x MxO3 (M' =Al,Ti) are studied. The dilution of the Mn network results in a weakening of the ferromagnetism, a deterioration of the metallic conductivity, and a strong enhancement of the magnetoresistance. Although Tc linearly decreases with x in the low substitution ranges for both Mseries, the scaling behavior Tc (np) previously observed for La0.7 Sr0.3 Mn1-x MxO3 is no longer obtained. Extrapolations of the Tc (np) linear curves to Tc =0K… 
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