Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3313937
Keywords
antiferromagnetic materials; calcium compounds; ferromagnetic materials; galvanomagnetic effects; induced anisotropy (magnetic); insulating materials; internal stresses; lanthanum compounds; magnetic thin films; magnetic transitions; praseodymium compounds
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Funding
- NSF of China [10874166, 50721061]
- National Basic Research Program of China [2006CB922005, 2009CB929502]
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We grow epitaxial (La0.8Pr0.2)(0.67)Ca0.33MnO3 films simultaneously on the lattice-closely-matched substrates, cubic (LaAlO3)(0.3)(Sr2AlTaO6)(0.7) [LSAT(001)] and orthorhombic NdGaO3 [NGO(001) and NGO(110)]. While all as-grown films show a ferromagnetic-metallic (FM) ground state as observed for the bulk target, the annealed films show quite different magnetotransport behavior as follows: on NGO(110) they show a robust FM ground state, on LSAT(001) and NGO(001) however, they show surprisingly a coexisted antiferromagnetic insulating state with high phase instability in a wide temperature range. The phase coexistence being easily induced via the control of anisotropic epitaxial strain suggests that the phase separation in manganites could be elastically driven, and thus can be strain-engineered for devices applications.
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