Effect of cobalt doping in Nd1-xSrxMn1-yCoyO3

Frontiers in Theoretical and Applied Physics/UAE 2017

Hamad, M Kh^1 ; Abdel-Latif, I.A.^2,3 ; Ziq, Kh A^1

Physics Department, King Fahd University of Petroleum and Minerals, Saudi Arabia^1

Physics Department, College of Sciences and Arts, Advanced Materials and Nano-Research Centre, Najran University, P.O. Box 1988, Najran

11001, Saudi Arabia^2

Reactor Physics Department, NRC, Atomic Energy Authority, Abou Zabaal P. O. 13759, Cairo, Egypt^3

关键词: Cobalt doping;    Magnetic exchange interactions;    Magnetic phase;    Magnetic state;    Minimum value;    Orthorhombic distortion;    Orthorhombic lattices;    Oxidation state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/869/1/012032/pdf
DOI  :  10.1088/1742-6596/869/1/012032

来源: IOP

【 摘 要 】

We investigate the effects of Co substitutions the associated magnetic phase changes and the orthorhombic lattice distortions in Nd0.6Sr0.4Mn1-xCoxO3. The effect of Co substitutions on the magnetic state and the orthorhombic lattice distortions has been studied. The orthorhombic distortion is found to be maximum (7.377 × 10-3) for the pure manganite phase and decreases almost linearly with Co doping, reaching its minimum value 1.044 × 10-31.044 × 10-3for the pure cobaltites. Similar behavior has been found for unite cell volume. Since Co may have several oxidation states, it may also affect the (Mn4+/Mn3+) ratio, the double magnetic exchange interaction, the magnetic state and metal insulator transition.