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Title: Detailed magnetic and structural properties of exchange-biased La{sub 1-x}Ca{sub x}MnO{sub 3}.

Abstract

We measured structural, magnetic and, magneto-transport properties of heterostructures consisting of La{sub 1-x} Ca{sub x} MnO{sub 3} ferromagnetic (FM) layers (x = 0.33) and antiferromagnetic (AF) layers (x = 0.67). We grew FM/AF superlattices via a high-pressure sputtering technique on (001) oriented SrTiO{sub 3} substrates. We systematically varied the thickness of the ferromagnetic layers, while maintaining a fixed thickness of the antiferromagnetic layers. Alternatively, we also varied the thickness of the antiferromagnetic layers, keeping a fixed ferromagnetic layer thickness. The total superlattice thickness was kept approximately constant. XRD analysis confirms the existence of the superlattice structure by the observation of multiple satellite peaks around the (00l) manganite Bragg reflections. We extracted the average lattice parameter of the superlattice and its dependence on the thicknesses of the ferro- and antiferromagnetic layers. We conducted field cooling (FC) and zero field cooling (ZFC), magneto-thermal, and magneto-resistance measurements. The existence of an exchange bias effect at temperatures below the Neel temperature of the AF layer was revealed by magnetization loops measured after FC. We studied the dependence of magnetic parameters on the thicknesses of the ferro- and antiferromagnetic layers. We found that the structural, magnetization, and magneto transport properties as functions of F-layer thicknessmore » are all correlated.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); COLCIENCIAS
OSTI Identifier:
940953
Report Number(s):
ANL/MSD/JA-62861
Journal ID: ISSN 1610-1634; TRN: US200824%%315
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys. Stat. Sol. C; Journal Volume: 4; Journal Issue: 11 ; 2007
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; BRAGG REFLECTION; LATTICE PARAMETERS; MAGNETIZATION; NEEL TEMPERATURE; SUPERLATTICES; THICKNESS; LANTHANUM OXIDES; CALCIUM OXIDES; MANGANESE OXIDES; MAGNETORESISTANCE

Citation Formats

Gomez, M. E., Campillo, G., Ramirez, J.-G., Hoffmann, A., Guimpel, J., Univ. del Valle, and Inst. Balseiro. Detailed magnetic and structural properties of exchange-biased La{sub 1-x}Ca{sub x}MnO{sub 3}.. United States: N. p., 2007. Web. doi:10.1002/pssc.200675906.
Gomez, M. E., Campillo, G., Ramirez, J.-G., Hoffmann, A., Guimpel, J., Univ. del Valle, & Inst. Balseiro. Detailed magnetic and structural properties of exchange-biased La{sub 1-x}Ca{sub x}MnO{sub 3}.. United States. doi:10.1002/pssc.200675906.
Gomez, M. E., Campillo, G., Ramirez, J.-G., Hoffmann, A., Guimpel, J., Univ. del Valle, and Inst. Balseiro. Mon . "Detailed magnetic and structural properties of exchange-biased La{sub 1-x}Ca{sub x}MnO{sub 3}.". United States. doi:10.1002/pssc.200675906.
@article{osti_940953,
title = {Detailed magnetic and structural properties of exchange-biased La{sub 1-x}Ca{sub x}MnO{sub 3}.},
author = {Gomez, M. E. and Campillo, G. and Ramirez, J.-G. and Hoffmann, A. and Guimpel, J. and Univ. del Valle and Inst. Balseiro},
abstractNote = {We measured structural, magnetic and, magneto-transport properties of heterostructures consisting of La{sub 1-x} Ca{sub x} MnO{sub 3} ferromagnetic (FM) layers (x = 0.33) and antiferromagnetic (AF) layers (x = 0.67). We grew FM/AF superlattices via a high-pressure sputtering technique on (001) oriented SrTiO{sub 3} substrates. We systematically varied the thickness of the ferromagnetic layers, while maintaining a fixed thickness of the antiferromagnetic layers. Alternatively, we also varied the thickness of the antiferromagnetic layers, keeping a fixed ferromagnetic layer thickness. The total superlattice thickness was kept approximately constant. XRD analysis confirms the existence of the superlattice structure by the observation of multiple satellite peaks around the (00l) manganite Bragg reflections. We extracted the average lattice parameter of the superlattice and its dependence on the thicknesses of the ferro- and antiferromagnetic layers. We conducted field cooling (FC) and zero field cooling (ZFC), magneto-thermal, and magneto-resistance measurements. The existence of an exchange bias effect at temperatures below the Neel temperature of the AF layer was revealed by magnetization loops measured after FC. We studied the dependence of magnetic parameters on the thicknesses of the ferro- and antiferromagnetic layers. We found that the structural, magnetization, and magneto transport properties as functions of F-layer thickness are all correlated.},
doi = {10.1002/pssc.200675906},
journal = {Phys. Stat. Sol. C},
number = 11 ; 2007,
volume = 4,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}