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Title: Evolution and control of the phase competition morphology in a manganite film
Authors: Zhou, H
Wang, L
Hou, Y
Huang, Z 
Lu, Q
Wu, W
Keywords: perovskite
electromagnetic field
imaging method
phase transition
temperature gradient
Fourier transformation
magnetic field
phase transition
room temperature
transition temperature
Issue Date: 2015
Publisher: Nature Publishing Group
Citation: Zhou, H, Wang, L, Hou, Y, Huang, Z, Lu, Q, Wu, W (2015). Evolution and control of the phase competition morphology in a manganite film. Nature Communications 6 : 8980. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: The competition among different phases in perovskite manganites is pronounced since their energies are very close under the interplay of charge, spin, orbital and lattice degrees of freedom. To reveal the roles of underlying interactions, many efforts have been devoted towards directly imaging phase transitions at microscopic scales. Here we show images of the charge-ordered insulator (COI) phase transition from a pure ferromagnetic metal with reducing field or increasing temperature in a strained phase-separated manganite film, using a home-built magnetic force microscope. Compared with the COI melting transition, this reverse transition is sharp, cooperative and martensitic-like with astonishingly unique yet diverse morphologies. The COI domains show variable-dimensional growth at different temperatures and their distribution can illustrate the delicate balance of the underlying interactions in manganites. Our findings also display how phase domain engineering is possible and how the phase competition can be tuned in a controllable manner.
Source Title: Nature Communications
ISSN: 2041-1723
DOI: 10.1038/ncomms9980
Rights: Attribution 4.0 International
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