High pressure synthesis of a new perovskite, (Srla)(mgmn)o6-x

Jin Ho Choy; Gérard Demazeau; Seung Tae Hong

doi:10.1143/JJAP.31.3649

High pressure synthesis of a new perovskite, (Srla)(mgmn)o_6-x

Jin Ho Choy
, Gérard Demazeau
, Seung Tae Hong

Department of Energy and Science and Engineering

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

A new cubic perovskite, (SrLa)(MgMn)0₆__x, has been prepared under the reaction conditions of high temperature (900°C) and high oxygen pressure (60 kbar). The latter condition was generated by in situ thermal decomposition of KC1O₃ in a belt-type apparatus. The X-ray diffraction pattern shows that Mg and Mn ions are distributed randomly in the B-site of the cubic perovskite with the lattice constants of 3.873(3) À. Redox titration and thermogravimetric analysis were carried out to determine the average oxidation state of manganese ions, and/or the content of oxygen deficiency that was deduced as x ≅ 0.38(2). Electron spin resonance spectra and magnetic susceptibility measurements indicate a weak ferromagnetic coupling due to the superexchange interaction between t_2g orbital electrons of Mn(IV) and Mn(V).

Original language	English
Pages (from-to)	3649-3654
Number of pages	6
Journal	Japanese Journal of Applied Physics
Volume	31
Issue number	11 R
DOIs	https://doi.org/10.1143/JJAP.31.3649
State	Published - Nov 1992

Keywords

Crystal structure
High oxygen pressure
Oxygen deficiency
Pentavalent manganese ion
Perovskite
Spectroscopic analysis
Thermal analysis

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10.1143/JJAP.31.3649

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title = "High pressure synthesis of a new perovskite, (Srla)(mgmn)o6-x",

abstract = "A new cubic perovskite, (SrLa)(MgMn)06\_x, has been prepared under the reaction conditions of high temperature (900°C) and high oxygen pressure (60 kbar). The latter condition was generated by in situ thermal decomposition of KC1O3 in a belt-type apparatus. The X-ray diffraction pattern shows that Mg and Mn ions are distributed randomly in the B-site of the cubic perovskite with the lattice constants of 3.873(3) {\`A}. Redox titration and thermogravimetric analysis were carried out to determine the average oxidation state of manganese ions, and/or the content of oxygen deficiency that was deduced as x ≅ 0.38(2). Electron spin resonance spectra and magnetic susceptibility measurements indicate a weak ferromagnetic coupling due to the superexchange interaction between t2g orbital electrons of Mn(IV) and Mn(V).",

keywords = "Crystal structure, High oxygen pressure, Oxygen deficiency, Pentavalent manganese ion, Perovskite, Spectroscopic analysis, Thermal analysis",

author = "Choy, \{Jin Ho\} and G{\'e}rard Demazeau and Hong, \{Seung Tae\}",

year = "1992",

month = nov,

doi = "10.1143/JJAP.31.3649",

language = "English",

volume = "31",

pages = "3649--3654",

journal = "Japanese Journal of Applied Physics",

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publisher = "Institute of Physics",

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}

TY - JOUR

T1 - High pressure synthesis of a new perovskite, (Srla)(mgmn)o6-x

AU - Choy, Jin Ho

AU - Demazeau, Gérard

AU - Hong, Seung Tae

PY - 1992/11

Y1 - 1992/11

N2 - A new cubic perovskite, (SrLa)(MgMn)06_x, has been prepared under the reaction conditions of high temperature (900°C) and high oxygen pressure (60 kbar). The latter condition was generated by in situ thermal decomposition of KC1O3 in a belt-type apparatus. The X-ray diffraction pattern shows that Mg and Mn ions are distributed randomly in the B-site of the cubic perovskite with the lattice constants of 3.873(3) À. Redox titration and thermogravimetric analysis were carried out to determine the average oxidation state of manganese ions, and/or the content of oxygen deficiency that was deduced as x ≅ 0.38(2). Electron spin resonance spectra and magnetic susceptibility measurements indicate a weak ferromagnetic coupling due to the superexchange interaction between t2g orbital electrons of Mn(IV) and Mn(V).

AB - A new cubic perovskite, (SrLa)(MgMn)06_x, has been prepared under the reaction conditions of high temperature (900°C) and high oxygen pressure (60 kbar). The latter condition was generated by in situ thermal decomposition of KC1O3 in a belt-type apparatus. The X-ray diffraction pattern shows that Mg and Mn ions are distributed randomly in the B-site of the cubic perovskite with the lattice constants of 3.873(3) À. Redox titration and thermogravimetric analysis were carried out to determine the average oxidation state of manganese ions, and/or the content of oxygen deficiency that was deduced as x ≅ 0.38(2). Electron spin resonance spectra and magnetic susceptibility measurements indicate a weak ferromagnetic coupling due to the superexchange interaction between t2g orbital electrons of Mn(IV) and Mn(V).

KW - Crystal structure

KW - High oxygen pressure

KW - Oxygen deficiency

KW - Pentavalent manganese ion

KW - Perovskite

KW - Spectroscopic analysis

KW - Thermal analysis

UR - https://www.scopus.com/pages/publications/0026944656

U2 - 10.1143/JJAP.31.3649

DO - 10.1143/JJAP.31.3649

M3 - Article

AN - SCOPUS:0026944656

SN - 0021-4922

VL - 31

SP - 3649

EP - 3654

JO - Japanese Journal of Applied Physics

JF - Japanese Journal of Applied Physics

IS - 11 R

ER -

High pressure synthesis of a new perovskite, (Srla)(mgmn)o_6-x

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Keywords

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