Effects of growing conditions on the electric and magnetic properties of strained La2/3Sr1/3MnO3 thin films

doi:10.1088/1674-1056/24/2/027504

Abstract We investigate the growing condition dependences of magnetic and electric properties of the La_2/3Sr_1/3MnO₃ thin films grown on SrTiO₃ (001) substrates. With reducing the film thickness and growth pressure, the Curie temperature (T_C) drops off, and the magnetism and metallicity are suppressed. At an appropriate deposition temperature, we can obtain the best texture and remarkably enhance the magnetic and electrical properties. However, the resistivity of film cannot be modulated by changing the dc current and green light intensity. This result may be induced by the coherent strains in the epitaxially grown film due to its lattice mismatching that of the SrTiO₃ substrate. Furthermore, we show that the relations between the magnetism and the resistivity for the typical films with different thickness values. For the 13.4-nm-thick film, the R-T curve presents two transition behaviors: insulator-to-metal and metal-to-insulator in the cooling process: the former corresponds to magnetic transition, and the later correlates with thermal excitation conduction.

Keywords: growing condition magnetism resistivity

Received: 19 August 2014
Revised: 14 October 2014
Accepted manuscript online:

PACS:	75.70.Ak	(Magnetic properties of monolayers and thin films)
	68.55.A-	(Nucleation and growth)
	75.47.Lx	(Magnetic oxides)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 111374348, 11134007, 11174345, and 111474341) and the National Basic Reaearch Program of China (Grant Nos. 2013CB921700, 2011CB921801, and 2012CB933000).

Corresponding Authors: Sun Ji-Rong
E-mail: jrsun@iphy.ac.cn

Cite this article:

Lu Hai-Xia (卢海霞), Wang Jing (王晶), Shen Bao-Gen (沈保根), Sun Ji-Rong (孙继荣) Effects of growing conditions on the electric and magnetic properties of strained La_2/3Sr_1/3MnO₃ thin films 2015 Chin. Phys. B 24 027504

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Effects of growing conditions on the electric and magnetic properties of strained La2/3Sr1/3MnO3 thin films

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Effects of growing conditions on the electric and magnetic properties of strained La_2/3Sr_1/3MnO₃ thin films