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Large domain wall magnetoresistance up to room temperature in La0.7Sr0.3MnO3 bridges with nanoconstrictions
To obtain low field magnetoresistance (MR) in manganites, we have introduced a geometrically constrained magnetic domain wall (DW) in La0.7Sr0.3MnO3 micrometric devices. Nanoconstrictions artificially...
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Colossal magnetoresistive La0.7(Pb1–xSrx)0.3MnO3 films for bolometer and magnetic sensor applications
We report on electrical and magnetic properties of a continuous series of solid solutions La0.7(Pb1–xSrx)0.3MnO3 prepared by the pulsed laser deposition technique on LaAlO3 and SrTiO3 single crys...

Magneto-optical Kerr effect in laser-patterned La2/3Sr1/3MnO3 epitaxial thin films

J. Appl. Phys. 89, 6958 (2001); doi:10.1063/1.1362647

Issue Date: 1 June 2001

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M. Bibes
Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB, E-08193 Bellaterra, Spain
Laboratoire de Physique de la Matière Condensée, Institut National des Sciences Appliquées, Complexe Scientifique de Rangueil, 31077 Toulouse Cedex 4, France

D. Hrabovsky
Laboratoire de Physique de la Matière Condensée, Institut National des Sciences Appliquées, Complexe Scientifique de Rangueil, 31077 Toulouse Cedex 4, France

B. Martínez
Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB, E-08193 Bellaterra, Spain

A. R. Fert
Laboratoire de Physique de la Matière Condensée, Institut National des Sciences Appliquées, Complexe Scientifique de Rangueil, 31077 Toulouse Cedex 4, France

V. Trtík and M. Varela
Department de Física Aplicada i Òptica, Universitat de Barcelona, Avinguda Diagonal 647, 08028 Barcelona, Spain

J. Fontcuberta
Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB, E-08193 Bellaterra, Spain
In this study, we have performed magneto-optical Kerr effect (MOKE) measurement on epitaxial La2/3Sr1/3MnO3 thin films containing artificial interfaces created by laser-patterning the SrTiO3 substrate. The observed increase of the resistivity and of the high-field magnetoresistance when measuring the films across the interface arrays are related to the reduction of the magnetization of the interfaces with respect to the rest of the film. As observed by the local MOKE probe, the structural disorder in the manganite film induced by the underlying patterned substrate leads to a large spin disorder responsible for a strong high-field susceptibility of the resistance. ©2001 American Institute of Physics.
Permalink: http://link.aip.org/link/?JAPIAU/89/6958/1
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KEYWORDS and PACS

Keywords
PACS
  • 78.66.Nk
    Optical properties, condensed-matter spectroscopy and other interactions of radiation and particles with condensed matter Optical properties of specific thin films Insulators
  • 78.20.Ls
    Optical properties, condensed-matter spectroscopy and other interactions of radiation and particles with condensed matter Optical properties of bulk materials and thin films Magnetooptical effects
  • 75.70.Cn
    Magnetic properties and materials Magnetic properties of thin films, surfaces, and interfaces Interfacial magnetic properties (multilayers, superlattices)
  • 81.65.Cf
    Materials science Surface treatments Surface cleaning, etching, patterning
  • 75.60.Ej
    Magnetic properties and materials Domain effects, magnetization curves, and hysteresis Magnetization curves, hysteresis, Barkhausen and related effects
  • 75.70.Pa
    Magnetic properties and materials Magnetic properties of thin films, surfaces, and interfaces Giant magnetoresistance
  • YEAR: 2001

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
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REFERENCES (7)
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  1. N. D. Mathur, G. Burnell, S. P. Isaac, T. J. Jackson, B. S. Teo, J. L. MacManus-Driscoll, L. F. Cohen, J. E. Evetts, and M. G. Blamire, Nature (London) 387, 266 (1997).
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  4. M. Bibes, B. Martínez, J. Fontcuberta, V. Trtík, F. Benítez, F. Sanchéz, and M. Varela, Appl. Phys. Lett. 75, 2120 (1999).
  5. J. Fontcuberta, M. Bibes, B. Martínez, V. Trtík, C. Ferrater, F. Sanchéz, and M. Varela, J. Appl. Phys. 85, 4800 (1999).
  6. M. J. Calderón, L. Brey, and F. Guinea, Phys. Rev. B 60, 6698 (1999).
  7. Ll. Balcells, B. Martínez, and J. Fontcuberta, Phys. Rev. B 58, R14697 (1998).

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