期刊
PHYSICAL REVIEW B
卷 78, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.172405
关键词
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资金
- Natural Sciences and Engineering Research Council
Magnetic phase transition in the manganite films has been found to be induced by the structural phase transition of the SrTiO(3) substrate at T(s)=105 K [Vlasko-Vlasov , Phys. Rev. Lett. 84, 2239 (2000) and Ziese , New J. Phys. 10, 063024 (2008)]. However, no change in the electrical transport properties has been detected at this temperature. Here we report the observation of the satellite peaks in the temperature dependence of the temperature coefficient of resistivity (TCR) at temperatures around 105 K in the ultrathin manganite films grown on SrTiO(3) substrates, triggered by the cubic-to-tetragonal structural phase transition in SrTiO(3). The TCR peak's magnitude decreases with an increasing thickness of the manganite film and with an increasing applied magnetic field. Our results demonstrate the strong coupling between the structural and transport properties in the manganite films.
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