Structural and Magnetic Properties Control
of Pr0.7Ba0.3MnO3 with Sr-Doping
Y. Phama, Y. K. Yub, T. V. Manha, A. Gamzatovc, D. M. Tartakovskyd, S.-C. Yue,
D.-S. Yangf, and D.-H. Kima,*
a Department of Physics, College of Natural Science, Chungbuk National University, Cheongju, 28644 South Korea
b Department of Mechanical and Aerospace Engineering, University of California, San Diego, California 92093-0411, USA
c Amirkhanov Institute of Physics, DSC of RAS, Makhachkala, 367003 Russia
d Department of Energy Resources Engineering, Stanford University, Stanford, CA 94305, USA
e School of Natural Science, Ulsan National Institute of Science and Technology, Ulsan, 44919 South Korea
f Department of Physics, College of Education, Chungbuk National University, Cheongju, 28644 South Korea
Correspondence to: * e-mail: donghyun@chungbuk.ac.kr
Received 30 December, 2019
Abstract—Structural and magnetic properties of Sr-doped Pr0.7Ba0.3MnO3 polycrystallines prepared by solid state reaction are presented. Samples were in monoclinic structure P21/n without structural phase transition when Ba was gradually replaced by Sr. Parameters a, b, and c of a unit cell monotonously decrease with increasing Sr content, while β angle has increased from 89.981° to 90.007°. The X-ray absorption spectra show the co-existence of Mn3+ and Mn4+ ions in materials and the number of Mn4+ ions increases in the presence of Sr. The thermal magnetization data indicate that the Curie temperature shifts toward room temperature from 190, 210, 232 to 267 K with increasing Sr content x from 0 to 0.3.
Keywords: structure, magnetic property, phase transition, valence, magnetic interaction
DOI: 10.1134/S1063783420050236