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Title: Spin-lattice coupling, Jahn-Teller effect and the influence of the measurement rate in La{sub 0.7}Ca{sub 0.3−x}Sr{sub x}MnO{sub 3} manganites

Abstract

This work presents a study of how the magnetic and temperature variables, as well as the measurement rate, affect magnetic and structural phase transitions for La{sub 0.7}Ca{sub 0.3−x}Sr{sub x}MnO{sub 3} (x=0.15, 0.08, 0.07 and 0.06) manganites. A single phase rhombohedral crystal structure for Sr{sub 0.15} compound and a single phase orthorhombic crystal structure for Sr{sub 0.08}, Sr{sub 0.07}, and Sr{sub 0.06} compounds were identified by X ray diffraction. The Curie temperature adjustment to room temperature was reached for Sr{sub 0.07} sample, in which a Jahn-Teller transition was observed. This Jahn-Teller transition showed a susceptible response to 0.5, 1, 2, 3, 5 and 7 K/min measurement rates, and was revealed without measurement sequence at 234, 257, 196, 233, 245 and 238 K respectively in thermomagnetic curves (10 mT). Also, Curie temperature increases sequentially around 2 K for the same measurement rates. To avoid magnetic field effect, a differential scanning calorimetry for Sr{sub 0.07} sample was obtained in the same temperature region, for 2, 3, 5, 7 K/min showing the Jahn-Teller phase transition at 225 K and a vibrational like behavior in the heat flux below 225 K, for all the temperature rates. The latter, is related to the static to dynamicmore » Jahn-Teller transition. Furthermore, Curie temperature appears around 284 K.« less

Authors:
;  [1]; ; ; ; ;  [2]
  1. Instituto de Ingeniería y Tecnología, Universidad Autónoma de Ciudad Juárez, Av. Del Charro 450 norte, 32310 Ciudad Juárez, Chihuahua, México (Mexico)
  2. Centro de Investigación en Materiales Avanzados, S. C., Miguel de Cervantes 120, 31109 Chihuahua, Chihuahua, México (Mexico)
Publication Date:
OSTI Identifier:
22611768
Resource Type:
Journal Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 6; Journal Issue: 5; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2158-3226
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CALCIUM COMPOUNDS; CALORIMETRY; COUPLING; CRYSTAL STRUCTURE; CRYSTALS; CURIE POINT; HEAT FLUX; JAHN-TELLER EFFECT; LANTHANUM COMPOUNDS; MAGNETIC FIELDS; MANGANATES; ORTHORHOMBIC LATTICES; PHASE TRANSFORMATIONS; SPIN; SPIN-LATTICE RELAXATION; STRONTIUM COMPOUNDS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0273-0400 K; TRIGONAL LATTICES; X-RAY DIFFRACTION

Citation Formats

Burrola-Gándara, L. A., Elizalde Galindo, J. T., Sáenz-Hernández, R. J., Santillán-Rodríguez, C. R., Lardizabal-Gutiérrez, D., Pizá-Ruiz, P., and Matutes-Aquino, J. A. Spin-lattice coupling, Jahn-Teller effect and the influence of the measurement rate in La{sub 0.7}Ca{sub 0.3−x}Sr{sub x}MnO{sub 3} manganites. United States: N. p., 2016. Web. doi:10.1063/1.4944656.
Burrola-Gándara, L. A., Elizalde Galindo, J. T., Sáenz-Hernández, R. J., Santillán-Rodríguez, C. R., Lardizabal-Gutiérrez, D., Pizá-Ruiz, P., & Matutes-Aquino, J. A. Spin-lattice coupling, Jahn-Teller effect and the influence of the measurement rate in La{sub 0.7}Ca{sub 0.3−x}Sr{sub x}MnO{sub 3} manganites. United States. doi:10.1063/1.4944656.
Burrola-Gándara, L. A., Elizalde Galindo, J. T., Sáenz-Hernández, R. J., Santillán-Rodríguez, C. R., Lardizabal-Gutiérrez, D., Pizá-Ruiz, P., and Matutes-Aquino, J. A. Sun . "Spin-lattice coupling, Jahn-Teller effect and the influence of the measurement rate in La{sub 0.7}Ca{sub 0.3−x}Sr{sub x}MnO{sub 3} manganites". United States. doi:10.1063/1.4944656.
@article{osti_22611768,
title = {Spin-lattice coupling, Jahn-Teller effect and the influence of the measurement rate in La{sub 0.7}Ca{sub 0.3−x}Sr{sub x}MnO{sub 3} manganites},
author = {Burrola-Gándara, L. A. and Elizalde Galindo, J. T. and Sáenz-Hernández, R. J. and Santillán-Rodríguez, C. R. and Lardizabal-Gutiérrez, D. and Pizá-Ruiz, P. and Matutes-Aquino, J. A.},
abstractNote = {This work presents a study of how the magnetic and temperature variables, as well as the measurement rate, affect magnetic and structural phase transitions for La{sub 0.7}Ca{sub 0.3−x}Sr{sub x}MnO{sub 3} (x=0.15, 0.08, 0.07 and 0.06) manganites. A single phase rhombohedral crystal structure for Sr{sub 0.15} compound and a single phase orthorhombic crystal structure for Sr{sub 0.08}, Sr{sub 0.07}, and Sr{sub 0.06} compounds were identified by X ray diffraction. The Curie temperature adjustment to room temperature was reached for Sr{sub 0.07} sample, in which a Jahn-Teller transition was observed. This Jahn-Teller transition showed a susceptible response to 0.5, 1, 2, 3, 5 and 7 K/min measurement rates, and was revealed without measurement sequence at 234, 257, 196, 233, 245 and 238 K respectively in thermomagnetic curves (10 mT). Also, Curie temperature increases sequentially around 2 K for the same measurement rates. To avoid magnetic field effect, a differential scanning calorimetry for Sr{sub 0.07} sample was obtained in the same temperature region, for 2, 3, 5, 7 K/min showing the Jahn-Teller phase transition at 225 K and a vibrational like behavior in the heat flux below 225 K, for all the temperature rates. The latter, is related to the static to dynamic Jahn-Teller transition. Furthermore, Curie temperature appears around 284 K.},
doi = {10.1063/1.4944656},
journal = {AIP Advances},
issn = {2158-3226},
number = 5,
volume = 6,
place = {United States},
year = {2016},
month = {5}
}