Transport and Magneto-Transport Properties of Ru Doped Ln0.67Sr0.33MnO3 (Ln = La, Pr, and Nd)

• Published in: Transactions of the Indian Institute of Metals Vol. 65; no. 5; pp. 443 - 447
• Main Authors: Bhargava, Deepshikha, Tank, Tejas M., Bodhaye, Ashish, Sanyal, Sankar P.
• Format: Journal Article
• Language: English
• Published: India Springer-Verlag 01.10.2012
• Subjects: Chemistry and Materials Science; Corrosion and Coatings; Materials Science; Metallic Materials; Technical Paper; Tribology; Magnetoresistance; CMR manganite; Mn site doping
• ISSN: 0972-2815; 0975-1645
• DOI: 10.1007/s12666-012-0155-4

The effect of Mn site doping by small amount Ru (5 %) on the transport and magneto-transport properties of the Ln 0.67 Sr 0.33 Mn 1− x Ru x O 3 (where Ln = La, Pr, and Nd, x  = 0, 0.05) has been studied. Polycrystalline samples were synthesized by the conventional solid state reaction method. The samples of Pr 0.67 Sr 0.33 Mn 1− x Ru x O 3 and Nd 0.67 Sr 0.33 Mn 1− x Ru x O 3 have shown single phase with orthorhombic structure as well as La 0.67 Sr 0.33 Mn 1− x Ru x O 3 has rhombohedral are revealed from XRD measurement. The temperature dependence of the resistivity is measured from 5 to 400 K. La 0.67 Sr 0.33 Mn 0.95 Ru 0.05 O 3 shows the metal–insulator (M–I) transition at 379 K while Pr 0.67 Sr 0.33 Mn 0.95 Ru 0.05 O 3 and Nd 0.67 Sr 0.33 Mn 0.95 Ru 0.05 O 3 have shown M–I transition at 294 and 249 K, respectively. The magnetoresistance (MR) was measured with an applied magnetic field of 1, 3 and 5 T. Though the M–I transition temperature decreases marginally, MR up to 70 % has been observed.