Physical properties of oxygen composition controlled La 1-xSrxMnOy single crystals

Yuui Yokota; Jun Ichi Shimoyama; Tetsuro Ogata; Shigeru Horii; Kohji Kishio

Physical properties of oxygen composition controlled La _1-xSr_xMnO_y single crystals

Yuui Yokota, Jun Ichi Shimoyama, Tetsuro Ogata, Shigeru Horii, Kohji Kishio

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We have investigated the effect of high-temperature post-annealing and control of excess oxygen for La_1-xSr_xMnO_y (0.05 ≤ × ≤ 0.2) single crystals. Thin plate-like single crystals prepared by careful cutting and polishing enabled the control of excess oxygen for the single crystals by post-annealing for relatively short times at various temperatures. Post-annealed crystals with y ∼ 3.00 exhibited higher T _C than as-grown crystals due to a homogenization of cation and oxygen compositions and reduction of local lattice strains. With an increase of y, T_C systematically increased for all Sr compositions. Competition between an increase of mean valence of manganese and a generation of cation vacancies determines the T_C of La_1-xSr_xMnO _y crystals.

Original language	English
Title of host publication	Solid-State Chemistry of Inorganic Materials VI
Pages	92-96
Number of pages	5
Publication status	Published - 2006 Dec 1
Externally published	Yes
Event	2006 MRS Fall Meeting - Boston, MA, United States Duration: 2006 Nov 27 → 2006 Nov 29

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	988
ISSN (Print)	0272-9172

Other

Other	2006 MRS Fall Meeting
Country/Territory	United States
City	Boston, MA
Period	06/11/27 → 06/11/29

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Cite this

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title = "Physical properties of oxygen composition controlled La 1-xSrxMnOy single crystals",

abstract = "We have investigated the effect of high-temperature post-annealing and control of excess oxygen for La1-xSrxMnOy (0.05 ≤ × ≤ 0.2) single crystals. Thin plate-like single crystals prepared by careful cutting and polishing enabled the control of excess oxygen for the single crystals by post-annealing for relatively short times at various temperatures. Post-annealed crystals with y ∼ 3.00 exhibited higher T C than as-grown crystals due to a homogenization of cation and oxygen compositions and reduction of local lattice strains. With an increase of y, TC systematically increased for all Sr compositions. Competition between an increase of mean valence of manganese and a generation of cation vacancies determines the TC of La1-xSrxMnO y crystals.",

author = "Yuui Yokota and Shimoyama, {Jun Ichi} and Tetsuro Ogata and Shigeru Horii and Kohji Kishio",

year = "2006",

month = dec,

day = "1",

language = "English",

isbn = "9781604234336",

series = "Materials Research Society Symposium Proceedings",

pages = "92--96",

booktitle = "Solid-State Chemistry of Inorganic Materials VI",

note = "2006 MRS Fall Meeting ; Conference date: 27-11-2006 Through 29-11-2006",

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T1 - Physical properties of oxygen composition controlled La 1-xSrxMnOy single crystals

AU - Yokota, Yuui

AU - Shimoyama, Jun Ichi

AU - Ogata, Tetsuro

AU - Horii, Shigeru

AU - Kishio, Kohji

PY - 2006/12/1

Y1 - 2006/12/1

N2 - We have investigated the effect of high-temperature post-annealing and control of excess oxygen for La1-xSrxMnOy (0.05 ≤ × ≤ 0.2) single crystals. Thin plate-like single crystals prepared by careful cutting and polishing enabled the control of excess oxygen for the single crystals by post-annealing for relatively short times at various temperatures. Post-annealed crystals with y ∼ 3.00 exhibited higher T C than as-grown crystals due to a homogenization of cation and oxygen compositions and reduction of local lattice strains. With an increase of y, TC systematically increased for all Sr compositions. Competition between an increase of mean valence of manganese and a generation of cation vacancies determines the TC of La1-xSrxMnO y crystals.

AB - We have investigated the effect of high-temperature post-annealing and control of excess oxygen for La1-xSrxMnOy (0.05 ≤ × ≤ 0.2) single crystals. Thin plate-like single crystals prepared by careful cutting and polishing enabled the control of excess oxygen for the single crystals by post-annealing for relatively short times at various temperatures. Post-annealed crystals with y ∼ 3.00 exhibited higher T C than as-grown crystals due to a homogenization of cation and oxygen compositions and reduction of local lattice strains. With an increase of y, TC systematically increased for all Sr compositions. Competition between an increase of mean valence of manganese and a generation of cation vacancies determines the TC of La1-xSrxMnO y crystals.

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M3 - Conference contribution

AN - SCOPUS:41549139302

SN - 9781604234336

T3 - Materials Research Society Symposium Proceedings

SP - 92

EP - 96

BT - Solid-State Chemistry of Inorganic Materials VI

T2 - 2006 MRS Fall Meeting

Y2 - 27 November 2006 through 29 November 2006

ER -