NDLI: Phase evolution and Sn-substitution in LiMn$_{2}$O$_{4}$ thin films prepared by pulsed laser deposition

Content Provider	Springer Nature Link
Author	Shin, Dong Wook Choi, Ji Won Cho, Yong Soo Yoon, Seok Jin
Copyright Year	2007
Abstract	LiMn$_{2}$O$_{4}$ thin films prepared on a Pt/Ti/SiO$_{2}$/Si(100) substrate by pulsed laser deposition were studied with focusing on the effects of different processing conditions and Sn substitution on phase evolvement and surface microstructure. Major experimental parameters include substrate temperature up to 770 °C and working oxygen pressure of 50–250 mTorr. LiMn$_{2}$O$_{4}$ thin films became highly crystallized with increased grain sizes as the substrate temperature increased. Second phases such as LiMnO$_{2}$ and Li$_{2}$Mn$_{2}$O$_{4}$ were found at the temperature of 300 and 770 °C, respectively. As an optimum condition, films grown at 450 °C showed a homogeneous spinel phase with well-defined crystallinity and smooth surface. A high pressure of oxygen tended to promote crystallization and grain growth. Working pressure did not affect significantly the phase formation of the thin films except that unexpected LiMn$_{3}$O$_{4}$ phase formed at the lowest oxygen pressure of 50 mTorr. Tin-substituted thin films showed lower Mn–O stretching vibrations, which suggests that more Li-ions can be inserted into vacant octahedral sites of the spinel structure.
Starting Page	200
Ending Page	205
Page Count	6
File Format	PDF
ISSN	13853449
Journal	Journal of Electroceramics
Volume Number	23
Issue Number	2-4
e-ISSN	15738663
Language	English
Publisher	Springer US
Publisher Date	2008-05-31
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	LiMn$_{2}$O$_{4}$ thin films Spinel Pulsed laser deposition Sn substitution Crystallography Electrochemistry Characterization and Evaluation of Materials Ceramics, Glass, Composites, Natural Methods Optical and Electronic Materials
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Materials Chemistry Mechanics of Materials Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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