Commensurate to Incommensurate Charge Ordering and Its Real-Space Images in La0.5Ca0.5MnO3

C. H. Chen and S-W. Cheong
Phys. Rev. Lett. 76, 4042 – Published 20 May 1996
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Abstract

The antiferromagnetic to ferromagnetic transition in La0.5Ca0.5MnO3 is accompanied by a commensurate to incommensurate charge-ordering transition. The presence of incommensurate charge correlation in the ferromagnetic phase is a remarkable interplay between charge and spin in double-exchange ferromagnets. Furthermore, a dark-field imaging technique has provided real-space images of charge-ordered domains revealing discommensurations inside the nearly commensurate domains. Local density fluctuations of discommensurations are responsible for the similar variations of the charge-ordering wave vector.

  • Received 24 January 1996

DOI:https://doi.org/10.1103/PhysRevLett.76.4042

©1996 American Physical Society

Authors & Affiliations

C. H. Chen and S-W. Cheong

  • Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974

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Issue

Vol. 76, Iss. 21 — 20 May 1996

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