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

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  • V. Markovich
  • Y. Yuzhelevski
  • G. Gorodetsky
  • G. Jung
  • C. Beek
  • Ya Mukovskii

Abstract

The resistive and magnetic properties of La 1-x Ca x MnO 3 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. Copyright Springer-Verlag Berlin/Heidelberg 2003

Suggested Citation

  • V. Markovich & Y. Yuzhelevski & G. Gorodetsky & G. Jung & C. Beek & Ya Mukovskii, 2003. "Nonlinear properties of ferromagnetic La $\mathsf{_{1-x}}$ Ca $\mathsf{_{x}}$ MnO $\mathsf{_3}$ single crystals," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 35(3), pages 295-300, October.
    • Handle: RePEc:spr:eurphb:v:35:y:2003:i:3:p:295-300
    DOI: 10.1140/epjb/e2003-00280-6
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