Magnetoresistance and electron paramagnetic resonance study of La 0.67-yYyBa0.33MnO3/LaAlO 3 thin films

K. W. Lee, J. I. Choi, S. H. Kim, Cheol Eui Lee, Y. H. Jo, S. G. Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Magnetoresistive La0.67-yYyBa0.33MnO 3/LaAlO3 thin films were prepared by the sol-gel spin-coating method. Our resistivity and the electron spin resonance (ESR) measurements indicate that the main factor determining the metal-insulator transition temperature Tm is the cation disorder represented by the cation radii variance σ2, and that ferromagnetic insulating regions coexist in the ferromagnetic metallic phase. In the paramagnetic phase, the dissociation energy of spin clusters and the polaron hopping energy obtained from the ESR intensity and linewidth also displayed a prominent dependence on σ2. Polaron localization due to Jahn-Teller distortions appears to be responsible simultaneously for the decrease in the ferromagnetic order and for the increase in the orbital order.

Original languageEnglish
Pages (from-to)753-758
Number of pages6
JournalSolid State Communications
Volume131
Issue number12
DOIs
Publication statusPublished - 2004 Sep 1

Fingerprint

Gene Conversion
Magnetoresistance
Paramagnetic resonance
Cations
electron paramagnetic resonance
Positive ions
cations
Jahn-Teller effect
Thin films
Metal insulator transition
Spin coating
thin films
Linewidth
Superconducting transition temperature
Sol-gels
coating
transition temperature
insulators
gels
disorders

Keywords

  • A. Magnetic films and multilayers
  • D. Spin dynamics
  • E. Electron paramagnetic resonance

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Magnetoresistance and electron paramagnetic resonance study of La 0.67-yYyBa0.33MnO3/LaAlO 3 thin films. / Lee, K. W.; Choi, J. I.; Kim, S. H.; Lee, Cheol Eui; Jo, Y. H.; Lee, S. G.

In: Solid State Communications, Vol. 131, No. 12, 01.09.2004, p. 753-758.

Research output: Contribution to journalArticle

Lee, K. W. ; Choi, J. I. ; Kim, S. H. ; Lee, Cheol Eui ; Jo, Y. H. ; Lee, S. G. / Magnetoresistance and electron paramagnetic resonance study of La 0.67-yYyBa0.33MnO3/LaAlO 3 thin films. In: Solid State Communications. 2004 ; Vol. 131, No. 12. pp. 753-758.
@article{04dfa98ac0b04ed8ba5c508e2cf4ab09,
title = "Magnetoresistance and electron paramagnetic resonance study of La 0.67-yYyBa0.33MnO3/LaAlO 3 thin films",
abstract = "Magnetoresistive La0.67-yYyBa0.33MnO 3/LaAlO3 thin films were prepared by the sol-gel spin-coating method. Our resistivity and the electron spin resonance (ESR) measurements indicate that the main factor determining the metal-insulator transition temperature Tm is the cation disorder represented by the cation radii variance σ2, and that ferromagnetic insulating regions coexist in the ferromagnetic metallic phase. In the paramagnetic phase, the dissociation energy of spin clusters and the polaron hopping energy obtained from the ESR intensity and linewidth also displayed a prominent dependence on σ2. Polaron localization due to Jahn-Teller distortions appears to be responsible simultaneously for the decrease in the ferromagnetic order and for the increase in the orbital order.",
keywords = "A. Magnetic films and multilayers, D. Spin dynamics, E. Electron paramagnetic resonance",
author = "Lee, {K. W.} and Choi, {J. I.} and Kim, {S. H.} and Lee, {Cheol Eui} and Jo, {Y. H.} and Lee, {S. G.}",
year = "2004",
month = "9",
day = "1",
doi = "10.1016/j.ssc.2004.07.003",
language = "English",
volume = "131",
pages = "753--758",
journal = "Solid State Communications",
issn = "0038-1098",
publisher = "Elsevier Limited",
number = "12",

}

TY - JOUR

T1 - Magnetoresistance and electron paramagnetic resonance study of La 0.67-yYyBa0.33MnO3/LaAlO 3 thin films

AU - Lee, K. W.

AU - Choi, J. I.

AU - Kim, S. H.

AU - Lee, Cheol Eui

AU - Jo, Y. H.

AU - Lee, S. G.

PY - 2004/9/1

Y1 - 2004/9/1

N2 - Magnetoresistive La0.67-yYyBa0.33MnO 3/LaAlO3 thin films were prepared by the sol-gel spin-coating method. Our resistivity and the electron spin resonance (ESR) measurements indicate that the main factor determining the metal-insulator transition temperature Tm is the cation disorder represented by the cation radii variance σ2, and that ferromagnetic insulating regions coexist in the ferromagnetic metallic phase. In the paramagnetic phase, the dissociation energy of spin clusters and the polaron hopping energy obtained from the ESR intensity and linewidth also displayed a prominent dependence on σ2. Polaron localization due to Jahn-Teller distortions appears to be responsible simultaneously for the decrease in the ferromagnetic order and for the increase in the orbital order.

AB - Magnetoresistive La0.67-yYyBa0.33MnO 3/LaAlO3 thin films were prepared by the sol-gel spin-coating method. Our resistivity and the electron spin resonance (ESR) measurements indicate that the main factor determining the metal-insulator transition temperature Tm is the cation disorder represented by the cation radii variance σ2, and that ferromagnetic insulating regions coexist in the ferromagnetic metallic phase. In the paramagnetic phase, the dissociation energy of spin clusters and the polaron hopping energy obtained from the ESR intensity and linewidth also displayed a prominent dependence on σ2. Polaron localization due to Jahn-Teller distortions appears to be responsible simultaneously for the decrease in the ferromagnetic order and for the increase in the orbital order.

KW - A. Magnetic films and multilayers

KW - D. Spin dynamics

KW - E. Electron paramagnetic resonance

UR - http://www.scopus.com/inward/record.url?scp=4243196964&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243196964&partnerID=8YFLogxK

U2 - 10.1016/j.ssc.2004.07.003

DO - 10.1016/j.ssc.2004.07.003

M3 - Article

VL - 131

SP - 753

EP - 758

JO - Solid State Communications

JF - Solid State Communications

SN - 0038-1098

IS - 12

ER -