NDLI: Effect of interlayer-induced asymmetrical stress on magnetotransport properties of epitaxial [Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3]20 superlattice

Content Provider	IEEE Xplore Digital Library
Author	Wang, H. Liu, H. Cao, M. Wang, X. Tan, W. Wang, X. Xu, F. Jia, Q. Gao, J.
Copyright Year	2015
Description	Author affiliation: Dept. of Phys., Univ. of Hong Kong, Hong Kong, China (Gao, J.) \|\| Dept. of Phys., Nanjing Univ. of Sci. & Technol., Nanjing, China (Wang, H.; Liu, H.; Cao, M.; Wang, X.; Tan, W.; Wang, X.) \|\| Sch. of Mater. Sci. & Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China (Xu, F.) \|\| Inst. of High Energy Phys., Beijing, China (Jia, Q.)
Abstract	Perovskite manganite $R_{1-x}A_{x}MnO_{3}$ (R=rare earth, A=alkaline earth) has been attracting great research interesting due to its magnetoelectronic phenomena such as colossal magnetoresistance (CMR), charge-orbital ordering, and metal-insulator transitions, etc.[1,2] In manganite superlattice, interfacial effects including cation intermixing, charge transfer, exchange coupling, strain and defect formation are crucial in determining the magnetic and transport properties of superlattice. [3-5] In this work, all-manganite $[Pr_{0.7}Sr_{0.3}MnO_{3}/La_{0.5}Ca_{0.5}MnO_{3}]_{20}$ superlattices were epitaxially fabricated on (001)-oriented single crystal MgO substrates with 24 nm $La_{0.5}Ca_{0.5}MnO_{3}$ buffer layer by using plused laser deposition. All the as-grown superlattices are of single phase and single orientation (see Fig.1). We obtained various stress at interface by varying relative layer thickness. As the thickness of $Pr_{0.7}Sr_{0.3}MnO_{3}$ layer and $La_{0.5}Ca_{0.5}MnO_{3}$ layer is not identical, interlayer-induced asymmetrical stress will occur and result in lower metal-insulator (MI) transition temperature and larger magnetoresistance (MR) in a wider temperature range. This result indicated that $[Pr_{0.7}Sr_{0.3}MnO_{3}/La_{0.5}Ca_{0.5}MnO_{3}]_{20}$ has opportunities for practical application in magnetic sensor and magnetic memory material. Furthermore, the percolation model has been used to quantitatively understand the transport mechanism of superlattice (see Fig.2). Our results demonstrated that inter-layer-induced asymmetrical stress accompanied with phase separation and charge ordering could strongly influence the magnetotransport properties of superlattice.
Starting Page	1
Ending Page	1
File Size	302241
Page Count	1
File Format	PDF
e-ISBN	9781479973224
DOI	10.1109/INTMAG.2015.7156913
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-05-11
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stress Magnetic superlattices Magnetoelectronics Magnetomechanical effects Magnetic properties
Content Type	Text
Resource Type	Article

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