Crystal structure, magnetic and elastic properties of Sr0,8Y0,2CoO2,65
https://doi.org/10.29235/1561-8323-2019-63-5-542-547
Abstract
Communicated by Corresponding Member Fedor P. Korshunov
A comprehensive study of the crystal structure, magnetic and elastic properties of layered cobaltite Sr0,8Y0,2CoO2,65 with a perovskite-type structure was carried out. It is established that the magnetic ordering in this composition is accompanied by a structural transition. The Neel temperature (TN) is 375 K. The unit cell volume at TN increases as a result of the orbital ordering in the CoO5 pyramids connected by the vertices in the anion-deficient layers. The main magnetic structure is an antiferromagnetic G-type structure with a small ferromagnetic component. The non-collinear magnetic structure is stabilized by the ferromagnetic bonds between the cobalt ions in the CoO5 pyramids. Co3+ ions in the both layers are in the mixed low-spin (LS)/high-spin (HS) state. The temperature dependence of the electrical resistivity has a semiconductor character. The large resistivity value and small magnetoresistance indicate a good stability of the semiconductor antiferromagnetic state of this composition.
Supporting agencies: The work is supported by the Belarusian Republican Foundation for Fundamental Research (Grant № Ф18Р-159)
About the Authors
Maxim V. Bushinsky
Scientific-Practical Materials Research Centre,National Academy of Sciences of Belarus
Russian Federation
Russian Federation
Bushinsky Maxim Vladislavovich - Ph. D. (Physics and Mathematics), Senior researcher.
19, P. Brovka Str., 220072, Minsk
Nina V. Tereshko
Scientific-Practical Materials Research Centre,National Academy of Sciences of Belarus
Russian Federation
Russian Federation
Tereshko Nina Viktorovna - Ph. D. (Physics and Mathematics), Researcher.
19, P. Brovka Str., 220072, Minsk
Alexandra N. Chobot
Scientific-Practical Materials Research Centre,National Academy of Sciences of Belarus
Russian Federation
Russian Federation
Chobot Aleksandra Nikolaevna - Ph. D. (Physics and Mathematics), Researcher.
19, P. Brovka Str., 220072, Minsk
Olga S. Mantytskaya
Scientific-Practical Materials Research Centre,National Academy of Sciences of Belarus
Russian Federation
Russian Federation
Mantytskaya Olga Stanislavovna - Ph. D. (Physics and Mathematics), Researcher.
19, P. Brovka Str., 220072, Minsk
Gennadii M. Chobot
Belarusian State Agrarian Technical University
Russian Federation
Russian Federation
Chobot Gennadii Mihailovich - Ph. D. (Physics and Mathematics), Assistant professor.
99, Nezavisimosti Ave., 220023, Minsk
Valeri M. Dobryansky
Belarusian State Agrarian Technical University
Russian Federation
Russian Federation
Dobryansky Valeri Mikhailovich - D. Sc. (Engineering), Professor.
99, Nezavisimosti Ave., 220023, Minsk
Sofija N. Pastushonok
Military Academy of the Republic of Belarus
Russian Federation
Russian Federation
Pastushonok Sofija Nikolaevna - Ph. D. (Physics and Mathematics), Assistant рrofessor.
220, Nezavisimosti Ave., 220057, Minsk
References
1. Podlesnyak A., Streule S., Mesot J., Medarde M., Pomjakushina E., Conder K., Tanaka A., Haverkort M. W., Khomskii D. I. Spin-State Transition in LaCoO3: Direct Neutron Spectroscopic Evidence of Excited Magnetic States. Physical Review Letters, 2006, vol. 97, no. 24, pp. 247208-1-247208-4. https://doi.org/10.1103/physrevlett.97.247208
2. Haverkort M. W., Hu Z., Cezar J. C., Burnus T., Hartmann H., Reuther M., Zobel C., Lorenz T., Tanaka A., Brookes N. B., Hsieh H. H., Lin H.-J., Chen C. T., Tjeng L. H. Spin State Transition in LaCoO3 Studied Using Soft X-ray Absorption Specroscopy and Magnetic Circular Dichroism. Physical Review Letters, 2006, vol. 97, no. 17, pp. 176405-1-176405-4. https://doi.org/10.1103/physrevlett.97.176405
3. Wu J., Leighton C. Glassy ferromagnetism and magnetic phase separation in La1_xSrxCoO3. Physical Review B, 2003, vol. 67, no. 17, pp. 174408-1-174408-16. https://doi.org/10.1103/physrevb.67.174408XX
4. Long Y., Kaneko Y., Ishiwata Sh., Taguchi Y., Tokura Y. Synthesis of cubic SrCoO3 single crystal and its anisotropic magnetic and transport properties. Journal of Physics: Condensed Matter, 2011, vol. 23, no. 24, pp. 245601-1-245601-6. https://doi.org/10.1088/0953-8984/23/24/245601
5. Munoz A., De la Calle C., Alonso J.A., Botta P.M., Pardo V., Baldomir D., Rivas J. Crystallographic and magnetic structure of SrCoO2 5 brownmillerite: Neutron study coupled with band-structure calculations. Physical Review B, 2008, vol. 78, no. 5, pp. 054404-1-054404-8. https://doi.org/10.1103/physrevb.78.054404
6. James M., Cassidy D., Wilson K. F., Horvat J., Withers R. L. Oxygen vacancy ordering and magnetism in the rare earth stabilised perovskite form of SrCoO3-5. Solid State Sciences, 2004, vol. 6, no. 7, pp. 655-662. https://doi.org/10.1016/j.solid-statesciences.2003.03.001
7. Troyanchuk I. O., Karpinsky D. V., Chobot A. N., Dobryanskii V. M., Chobot G. M., Sazonov A. P. Magnetic transformations in the Sr078Y0 22Co1-xFexO3- system with a perovskite structure. Journal of Experimental and Theoretical Physics, 2009, vol. 108, no. . 3, pp. 428-434. https://doi.org/10.1134/s1063776109030078
8. Sheptyakov D. V., Pomjakushin V. Yu., Drozhzhin O. A., Istomin S. Ya., Antipov E. V., Bobrikov I. A., Balagurov A. M. Correlation of chemical coordination and magnetic ordering in Sr3YCo4O105+5 (5 = 0.02 and 0.26). Physical Review B, 2009, vol. 80, no. 2, pp. 024409-1-024409-10. https://doi.org/10.1103/physrevb.80.024409
9. Roisnel T., Rodriquez-Carvajal J. WinPLOTR: A Windows Tool for Powder Diffraction Pattern Analysis. Materials Science Forum, 2001, vol. 378-381, pp. 118-123. https://doi.org/10.4028/www.scientific.net/msf.378-381.118
10. Gupta K., Mahadevan P. Strain-driven magnetism in LaCoO3 thin films. Physical Review B, 2009, vol. 79, no. 2, pp. 020406-1-020406-4. https://doi.org/10.1103/physrevb.79.020406
11. Itoh M., Nawata Y., Kiyama T., Akahoshi D., Fujiwara N., Ueda Y. Local magnetic properties and spin state of YBaCo2O5 5:59Co NMR study. Physica B: Condensed Matter, 2003, vol. 329-333, pp. 751-752. https://doi.org/10.1016/s0921-4526(02)02490-0
12. Padilla-Pantoja J., Frontera C., Castano O., Garda-Munoz J. L. Simultaneous para-ferrimagnetic, metal-insulator, and orthorhombic-monoclinic transitions in Y2BaCoO5 5. Physical Review B, 2010, vol. 81, no. 13, pp. 132405-1-132405-4. https://doi.org/10.1103/physrevb.81.132405
Review
Views: 1273
Email this article 