Effect of the Jahn-Teller Distortion on Double Exchange Interaction in La_{0.8}K_{0.2}MnO₃ Nanoparticles

• Authors: M. Mihalik , M. Zentková , M. Vavra , M. Mihalik Jr. , J. Lazúrová , V. Girman , P. Konieczny , M. Fitta , S. Il'kovič
• Languages of publication: EN

Abstracts

EN

Electric resistance and effect of hydrostatic pressure on magnetic properties has been studied on the La_{0.8}K_{0.2}MnO₃ nanoparticles. Magnetic phase transition is affected by pressure only slightly, the Curie temperature T_{C} decreases with the rate of -1.02 K/GPa, on samples with orthorhombic structure where the Jahn-Teller distortion of lattice is large. On the other hand, T_{C} increases with the rate of 20.1 K/GPa on samples with rhombohedral structure, where the Jahn-Teller distortion of lattice is absent. Insulator type of electrical resistance is characteristic feature of sample with large Jahn-Teller distortion of lattice and insulator-metal transition was observed on samples where the Jahn-Teller distortion is negligible. Our results are in line with theoretical calculation predicting that double exchange interaction is suppressed by the Jahn-Teller distortion.

Keywords

EN

75.50.-y; 75.47.Lx; 75.30.-m; 75.30.Kz

Discipline

• 75.50.-y: Studies of specific magnetic materials
• 75.47.Lx: Magnetic oxides
• 75.30.Kz: Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)(for ferroelectric phase transitions, see 77.80.B-; for superconductivity phase diagrams, see 74.25.Dw)
• 75.30.-m: Intrinsic properties of magnetically ordered materials(for critical point effects, see 75.40.-s; for magnetotransport phenomena, see 75.47.-m)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 4
• Pages: 875-877

Dates

published

2017-04

Contributors

author

M. Mihalik

• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia

author

M. Zentková

• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia

author

M. Vavra

• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia
• Institute of Chemistry, Faculty of Science, P.J. Šafarik University, Moyzesova 11, 041 54 Košice, Slovakia

author

M. Mihalik Jr.

• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia

author

J. Lazúrová

• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia

author

V. Girman

• Institute of Physics, Faculty of Science, P.J. Šafarik University, Moyzesova 11, 041 54 Košice, Slovakia

author

P. Konieczny

• Institute of Nuclear Physics, Polish Academy of Sciences, E. Radzikowskiego 152, 31-342 Kraków, Poland

author

M. Fitta

• Institute of Nuclear Physics, Polish Academy of Sciences, E. Radzikowskiego 152, 31-342 Kraków, Poland

author

S. Il'kovič

• Faculty of Humanities and Natural Sciences, University of Prešov, 17 novembra 1, Prešov, Slovak Republic

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Identifiers

DOI

10.12693/APhysPolA.131.875