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Nonlinear properties of ferromagnetic La \(\mathsf{_{1-x}}\)Ca\(\mathsf{_{x}}\)MnO\(\mathsf{_3}\) single crystals

  • V. Markovich
  • Y. Yuzhelevski
  • G. Gorodetsky
  • G. JungEmail author
  • C. J. van der Beek
  • Ya M. Mukovskii
OriginalPaper

Abstract.

The resistive and magnetic properties of La1-x Ca x MnO3 single crystals are investigated. In particular, properties of close-to-critically doped crystals with x = 0.22 are confronted with those of underdoped crystals with x = 0.18 and x = 0.2 and optimally doped crystals with x = 0.3. A systematic investigation of nonlinear transport shows that the critically doped crystal does not simply constitute an intermediate case between strongly nonlinear underdoped and linear, optimally doped one. The observed low-temperature resistivity increase can be interpreted in terms of orbital ordering or as a manifestation of an intrinsic tunnelling mechanism. The transport measurements have been completed by magneto-optic investigations which suggest that the low temperature resistivity of the underdoped x = 0.18 compound is dominated by tunnelling through intrinsic barriers associated with twin domains, while phase separation dominates in the critically doped x = 0.22 compound.

Keywords

Magnetic Property Phase Separation Systematic Investigation Nonlinear Property Intermediate Case 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2003

Authors and Affiliations

  • V. Markovich
    • 1
  • Y. Yuzhelevski
    • 1
  • G. Gorodetsky
    • 1
  • G. Jung
    • 2
    Email author
  • C. J. van der Beek
    • 2
  • Ya M. Mukovskii
    • 3
  1. 1.Department of PhysicsBen Gurion University of the NegevBeer ShevaIsrael
  2. 2.Laboratoire des Solides IrradiésÉcole PolytechniquePalaiseauFrance
  3. 3.Moscow State Steel and Alloys InstituteMoscowRussia

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