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Title: Structure-properties phase diagram for La{sub 1-x}Sr{x}MnO{sub 3} (0.1{le}x{le}0.2).

Abstract

By combining the results of magnetization, resistivity, and neutron powder-diffraction data for stoichiometric La{sub 1-x}Sr{sub x}MnO{sub 3}, we have constructed a phase diagram that describes the magnetic, transport, and structural properties and the relationships among them as a function of composition (0.1{<=}x{<=}0.2) and temperature (10-340 K). We show that, with increasing Sr content, the Curie temperature increases linearly, while the temperature of an orbital ordering transition to a state with a large coherent Jahn-Teller (JT) distortion decreases. These two phase-transition lines cross at x=0.145 and T=210 K. When the transition to the ferromagnetic state occurs in a phase that has a large coherent JT distortion (x<0.145), a strong magnetolattice coupling is observed; the coherent JT distortion is dramatically reduced and the incoherent distortion is enhanced in the ferromagnetic phase. For x>0.145, where the coherent JT distortion is small above Curie temperature, magnetolattice coupling reduces the incoherent distortion at T{sub c} and strongly suppresses the transition to a phase with a large coherent JT distortion. These observations are consistent with a competition between ferromagnetism and JT distortion that is mediated by a colossal spin-charge-lattice coupling. A metallic state occurs below the Curie temperature when both coherent and incoherent JT distortions aremore » suppressed.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); USDOD
OSTI Identifier:
942759
Report Number(s):
ANL/MSD/JA-34314
Journal ID: ISSN 1098-0121; TRN: US0904223
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Phys. Rev. B
Additional Journal Information:
Journal Volume: 60; Journal Issue: 10 ; Sep. 1, 1999; Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
ENGLISH
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COUPLING; CURIE POINT; FERROMAGNETISM; LANTHANUM OXIDES; MANGANESE OXIDES; MAGNETIC PROPERTIES; MAGNETIZATION; NEUTRONS; PHASE DIAGRAMS; STRONTIUM OXIDES; TRANSPORT

Citation Formats

Dabrowski, B., Xiong, X., Bukowski, Z., Dybzinski, R., Klamut, P. W., Siewenie, J. E., Chmaissem, O., Shaffer, J., Kimball, C. W., Jorgensen, J. D., Short, S., Materials Science Division, and Northern Illinois Univ. Structure-properties phase diagram for La{sub 1-x}Sr{x}MnO{sub 3} (0.1{le}x{le}0.2).. United States: N. p., 1999. Web. doi:10.1103/PhysRevB.60.7006.
Dabrowski, B., Xiong, X., Bukowski, Z., Dybzinski, R., Klamut, P. W., Siewenie, J. E., Chmaissem, O., Shaffer, J., Kimball, C. W., Jorgensen, J. D., Short, S., Materials Science Division, & Northern Illinois Univ. Structure-properties phase diagram for La{sub 1-x}Sr{x}MnO{sub 3} (0.1{le}x{le}0.2).. United States. doi:10.1103/PhysRevB.60.7006.
Dabrowski, B., Xiong, X., Bukowski, Z., Dybzinski, R., Klamut, P. W., Siewenie, J. E., Chmaissem, O., Shaffer, J., Kimball, C. W., Jorgensen, J. D., Short, S., Materials Science Division, and Northern Illinois Univ. Wed . "Structure-properties phase diagram for La{sub 1-x}Sr{x}MnO{sub 3} (0.1{le}x{le}0.2).". United States. doi:10.1103/PhysRevB.60.7006.
@article{osti_942759,
title = {Structure-properties phase diagram for La{sub 1-x}Sr{x}MnO{sub 3} (0.1{le}x{le}0.2).},
author = {Dabrowski, B. and Xiong, X. and Bukowski, Z. and Dybzinski, R. and Klamut, P. W. and Siewenie, J. E. and Chmaissem, O. and Shaffer, J. and Kimball, C. W. and Jorgensen, J. D. and Short, S. and Materials Science Division and Northern Illinois Univ.},
abstractNote = {By combining the results of magnetization, resistivity, and neutron powder-diffraction data for stoichiometric La{sub 1-x}Sr{sub x}MnO{sub 3}, we have constructed a phase diagram that describes the magnetic, transport, and structural properties and the relationships among them as a function of composition (0.1{<=}x{<=}0.2) and temperature (10-340 K). We show that, with increasing Sr content, the Curie temperature increases linearly, while the temperature of an orbital ordering transition to a state with a large coherent Jahn-Teller (JT) distortion decreases. These two phase-transition lines cross at x=0.145 and T=210 K. When the transition to the ferromagnetic state occurs in a phase that has a large coherent JT distortion (x<0.145), a strong magnetolattice coupling is observed; the coherent JT distortion is dramatically reduced and the incoherent distortion is enhanced in the ferromagnetic phase. For x>0.145, where the coherent JT distortion is small above Curie temperature, magnetolattice coupling reduces the incoherent distortion at T{sub c} and strongly suppresses the transition to a phase with a large coherent JT distortion. These observations are consistent with a competition between ferromagnetism and JT distortion that is mediated by a colossal spin-charge-lattice coupling. A metallic state occurs below the Curie temperature when both coherent and incoherent JT distortions are suppressed.},
doi = {10.1103/PhysRevB.60.7006},
journal = {Phys. Rev. B},
issn = {1098-0121},
number = 10 ; Sep. 1, 1999,
volume = 60,
place = {United States},
year = {1999},
month = {9}
}