Coupling of magnetic field and lattice strain and its impact on electronic phase separation in La0.335Pr0.335Ca0.33MnO3/ferroelectric crystal heterostructures

Phase-separated La0.335Pr0.335Ca0.33MnO3 films were epitaxially grown on (001)- and (111)-oriented ferroelectric single-crystal substrates. Upon poling along the [001] or [111] direction, dramatic decrease in resistance, up to 99.98%, and complete melting of the charge-ordered phase were observed, c...

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Bibliographic Details
Published in:Applied physics letters 2013-12, Vol.103 (26)
Main Authors: Zheng, M., Li, X. Y., Yang, M. M., Zhu, Q. X., Wang, Y., Li, X. M., Shi, X., Chan, H. L. W., Li, X. G., Luo, H. S., Zheng, R. K.
Format: Article
Language:English
Subjects:
Applied physics
Crystal structure
Deoxidizing
Electronics
Electrostatic charge
Epitaxial growth
Ferroelectric crystals
Ferroelectric materials
Ferroelectricity
Heterostructures
Lattice strain
Magnetic fields
Phase separation
Single crystals
Substrates
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Summary:Phase-separated La0.335Pr0.335Ca0.33MnO3 films were epitaxially grown on (001)- and (111)-oriented ferroelectric single-crystal substrates. Upon poling along the [001] or [111] direction, dramatic decrease in resistance, up to 99.98%, and complete melting of the charge-ordered phase were observed, caused by poling-induced strain rather than accumulation of electrostatic charge at interface. Such poling-induced strain effects can be effectively tuned by a magnetic field and mediated by electronic phase separation. In particular, our findings show that the evolution of the strength of electronic phase separation against temperature and magnetic field can be determined by measuring the strain-tunability of resistance [(ΔR/R)strain] under magnetic fields.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4860415