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ЖУРНАЛЫ // Физика твердого тела // Архив

Физика твердого тела, 2020, том 62, выпуск 5, страница 756 (Mi ftt10190)

Эта публикация цитируется в 4 статьях

Международная конференция ''Фазовые переходы, критические и нелинейные явления в конденсированных средах'', Махачкала, 15-20 сентября 2019г.
Магнетизм

Structural and magnetic properties control of Pr$_{0.7}$Ba$_{0.3}$MnO$_3$ with Sr-doping

Y. Phama, Y. K. Yub, T. V. Mạnha, A.Gamzatovc, D. M. Tartakovskyd, S.-C. Yue, D.-S. Yangf, 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

Аннотация: Structural and magnetic properties of Sr-doped Pr$_{0.7}$Ba$_{0.3}$MnO$_3$ polycrystallines prepared by solid state reaction are presented. Samples were in monoclinic structure $P$2$_1$/$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 $\beta$ angle has increased from 89.981$^\circ$ to 90.007$^\circ$. The $X$-ray absorption spectra show the co-existence of Mn$^{3+}$ and Mn$^{4+}$ ions in materials and the number of Mn$^{4+}$ 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.

Ключевые слова: structure, magnetic property, phase transition, valence, magnetic interaction.

Поступила в редакцию: 30.12.2019
Исправленный вариант: 30.12.2019
Принята в печать: 10.01.2020

Язык публикации: английский


 Англоязычная версия: Physics of the Solid State, 2020, 62:5, 845–850


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