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


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.


Magnetic Property Phase Separation Systematic Investigation Nonlinear Property Intermediate Case 
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© 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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