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Title: Magnetic, electrical, and optical properties of Ca{sub 1-x}Ce{sub x}MnO{sub 3} (x {<=} 0.12) single crystals

Abstract

The magnetic, electrical, and optical properties of Ca{sub 1-x}Ce{sub x}MnO{sub 3} (x{<=}0.12) manganite single crystals are investigated with the aim of revealing the specific features of the multiphase electronic and magnetic state as a function of the cerium concentration and the atmosphere used for growing single crystals. It is found that the concentration dependence of the low-temperature magnetization M(x) of the single crystals is shifted toward the high-concentration range as compared to the corresponding dependence of the polycrystals, which is explained by the predominant cation deficiency. The electrical resistivity and the reflection spectra of the single crystals in the infrared spectral range indicate that charge carriers exhibit a band nature at temperatures close to room temperature. The temperature dependence of the electrical resistivity of the single crystal with x = 0.08, which has the maximum magnetization in the studied series of Ca{sub 1-x}Ce{sub x}MnO{sub 3} compounds, unlike polycrystals, exhibits a metallic behavior over the entire temperature range. The G-type antiferromagnetic phase with the Neel and Curie temperatures T{sub N}(G) = T{sub C} = 100 K is characterized by maxima of the electrical resistivity {rho} and the magnetoresistance {delta}{rho}/{rho} = vertical bar ({rho}{sub 0} - {rho}{sub H})/{rho}{sub 0} vertical bar =more » 38% in the magnetic field H = 90 kOe. The magnetoresistance {delta}{rho}/{rho} of the single crystals at cerium concentrations x = 0.10 and 0.12 with variations in temperature exhibit three specific features: near the temperature of charge ordering T{sub co}, near the temperature of the magnetic phase transition to the C-type antiferromagnetic phase T{sub N}(C), and near the temperature of the phase transition to the magnetic charge-ordered phase T{sub N}(MCO). An anomalous temperature dependence of the magnetization is revealed for a single crystal with x = 0.10 grown in oxygen at a pressure of 5 atm, which is explained by the presence of regions with hole conductivity due to cation deficiency. The inhomogeneous electronic and magnetic state is associated with the interrelation of the charge, orbital, and spin orderings.« less

Authors:
; ; ; ;  [1];  [2]
  1. Russian Academy of Sciences, Institute of Metal Physics, Ural Division (Russian Federation)
  2. Moscow Power Engineering Institute (Technical University) (Russian Federation)
Publication Date:
OSTI Identifier:
21246966
Resource Type:
Journal Article
Journal Name:
Journal of Experimental and Theoretical Physics
Additional Journal Information:
Journal Volume: 108; Journal Issue: 1; Other Information: DOI: 10.1134/S1063776109010129; Copyright (c) 2009 Pleiades Publishing, Ltd; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7761
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANTIFERROMAGNETISM; ATMOSPHERES; CALCIUM COMPOUNDS; CATIONS; CERIUM COMPOUNDS; CHARGE CARRIERS; CURIE POINT; MAGNETIC FIELDS; MAGNETIZATION; MAGNETORESISTANCE; MANGANATES; MONOCRYSTALS; OPTICAL PROPERTIES; OXYGEN; PHASE TRANSFORMATIONS; POLYCRYSTALS; REFLECTION; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K

Citation Formats

Loshkareva, N. N., E-mail: loshkareva@imp.uran.ru, Korolev, A V, Solin, N I, Mostovshchikova, E V, Naumov, S V, Kostromitina, N V, and Balbashov, A M. Magnetic, electrical, and optical properties of Ca{sub 1-x}Ce{sub x}MnO{sub 3} (x {<=} 0.12) single crystals. United States: N. p., 2009. Web. doi:10.1134/S1063776109010129.
Loshkareva, N. N., E-mail: loshkareva@imp.uran.ru, Korolev, A V, Solin, N I, Mostovshchikova, E V, Naumov, S V, Kostromitina, N V, & Balbashov, A M. Magnetic, electrical, and optical properties of Ca{sub 1-x}Ce{sub x}MnO{sub 3} (x {<=} 0.12) single crystals. United States. https://doi.org/10.1134/S1063776109010129
Loshkareva, N. N., E-mail: loshkareva@imp.uran.ru, Korolev, A V, Solin, N I, Mostovshchikova, E V, Naumov, S V, Kostromitina, N V, and Balbashov, A M. Thu . "Magnetic, electrical, and optical properties of Ca{sub 1-x}Ce{sub x}MnO{sub 3} (x {<=} 0.12) single crystals". United States. https://doi.org/10.1134/S1063776109010129.
@article{osti_21246966,
title = {Magnetic, electrical, and optical properties of Ca{sub 1-x}Ce{sub x}MnO{sub 3} (x {<=} 0.12) single crystals},
author = {Loshkareva, N. N., E-mail: loshkareva@imp.uran.ru and Korolev, A V and Solin, N I and Mostovshchikova, E V and Naumov, S V and Kostromitina, N V and Balbashov, A M},
abstractNote = {The magnetic, electrical, and optical properties of Ca{sub 1-x}Ce{sub x}MnO{sub 3} (x{<=}0.12) manganite single crystals are investigated with the aim of revealing the specific features of the multiphase electronic and magnetic state as a function of the cerium concentration and the atmosphere used for growing single crystals. It is found that the concentration dependence of the low-temperature magnetization M(x) of the single crystals is shifted toward the high-concentration range as compared to the corresponding dependence of the polycrystals, which is explained by the predominant cation deficiency. The electrical resistivity and the reflection spectra of the single crystals in the infrared spectral range indicate that charge carriers exhibit a band nature at temperatures close to room temperature. The temperature dependence of the electrical resistivity of the single crystal with x = 0.08, which has the maximum magnetization in the studied series of Ca{sub 1-x}Ce{sub x}MnO{sub 3} compounds, unlike polycrystals, exhibits a metallic behavior over the entire temperature range. The G-type antiferromagnetic phase with the Neel and Curie temperatures T{sub N}(G) = T{sub C} = 100 K is characterized by maxima of the electrical resistivity {rho} and the magnetoresistance {delta}{rho}/{rho} = vertical bar ({rho}{sub 0} - {rho}{sub H})/{rho}{sub 0} vertical bar = 38% in the magnetic field H = 90 kOe. The magnetoresistance {delta}{rho}/{rho} of the single crystals at cerium concentrations x = 0.10 and 0.12 with variations in temperature exhibit three specific features: near the temperature of charge ordering T{sub co}, near the temperature of the magnetic phase transition to the C-type antiferromagnetic phase T{sub N}(C), and near the temperature of the phase transition to the magnetic charge-ordered phase T{sub N}(MCO). An anomalous temperature dependence of the magnetization is revealed for a single crystal with x = 0.10 grown in oxygen at a pressure of 5 atm, which is explained by the presence of regions with hole conductivity due to cation deficiency. The inhomogeneous electronic and magnetic state is associated with the interrelation of the charge, orbital, and spin orderings.},
doi = {10.1134/S1063776109010129},
url = {https://www.osti.gov/biblio/21246966}, journal = {Journal of Experimental and Theoretical Physics},
issn = {1063-7761},
number = 1,
volume = 108,
place = {United States},
year = {2009},
month = {1}
}