Effect of Ru Substitution on Temperature Coefficient of Resistance and Magnetoresistance Properties of Nd_0.67Sr_0.33MnO₃

Abstract:

The effect of Ru substitution on temperature coefficient of resistance (TCR) and electrical transport properties of Nd_0.67Sr_0.33Mn_1-xRu_xO₃ (with x = 0, 0.05 and 0.1) manganites prepared by solid state reaction route are studied. Ru substitution at Mn sites leads to reduction in T_P and increase the overall MR. The electrical transport mechanisms of these compounds are investigated by using different theoretical models, for temperatures below and above T_P. The maximum value of TCR of Nd_0.67Sr_0.33Mn_1-xRu_xO₃ (x= 0.05 and 0.1) are found to be higher compared to pristine compound. For memory device and bolometer IR detectors application point of view, all samples show the maximum magnetoresistance (MR) of 81 % at 5 T applied magnetic field, while the temperature coefficient of resistance (TCR) is found to ~17% K^-1.

• Periodical: Journal of Metastable and Nanocrystalline Materials (Volume 28)
• Pages: 85-92
• DOI: https://doi.org/10.4028/www.scientific.net/JMNM.28.85
• Online since: December 2016
• Authors: Deepshikha Acharya, Abhinav Bhargav, Tejas M. Tank, Sankar P. Sanyal
• Keywords: Manganite, Mn-Site Substitution, Temperature Coefficient of Resistance

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