Quenching-promoted anomalous electromagnetic behaviors of polycrystalline La0.67Ba0.33MnO3 compound by hydrogen annealing

Yimin Cui; Liuwan Zhang; Rongming Wang

doi:10.1016/j.jallcom.2006.03.058

Quenching-promoted anomalous electromagnetic behaviors of polycrystalline La_0.67Ba_0.33MnO₃ compound by hydrogen annealing

Yimin Cui^*
, Liuwan Zhang
, Rongming Wang

^*Corresponding author for this work

School of Physics

Tsinghua University
Beihang University

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

4 Scopus citations

Abstract

Anomalous annealing behaviors of insulator-metal transition temperature (T_P) and ac magnetic susceptibility were investigated in different prepared polycrystalline La_0.67Ba_0.33MnO₃ bulk samples which were annealed in a flow of 95%Ar:5%H₂(AH) at 700 °C for different time, and the behaviors were effects of oxygen loss and Ba ion vacancies. The experiments indicated that different prepared samples had different speed of oxygen loss and Ba ion vacancies during AH annealing. Different prepared samples had different content of structure defects, especially for the quenching samples, in which there were high stress and high defect content, the speed of oxygen loss and Ba²⁺ vacancies were the fastest during AH annealing, that was to say that quenching promote the hydrogen annealing effects on polycrystalline La_0.67Ba_0.33MnO₃ compound.

Original language	English
Pages (from-to)	40-43
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	428
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2006.03.058
State	Published - 31 Jan 2007

Keywords

Defect and oxygen content
Hydrogen annealing
Manganite

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10.1016/j.jallcom.2006.03.058

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title = "Quenching-promoted anomalous electromagnetic behaviors of polycrystalline La0.67Ba0.33MnO3 compound by hydrogen annealing",

abstract = "Anomalous annealing behaviors of insulator-metal transition temperature (TP) and ac magnetic susceptibility were investigated in different prepared polycrystalline La0.67Ba0.33MnO3 bulk samples which were annealed in a flow of 95\%Ar:5\%H2(AH) at 700 °C for different time, and the behaviors were effects of oxygen loss and Ba ion vacancies. The experiments indicated that different prepared samples had different speed of oxygen loss and Ba ion vacancies during AH annealing. Different prepared samples had different content of structure defects, especially for the quenching samples, in which there were high stress and high defect content, the speed of oxygen loss and Ba2+ vacancies were the fastest during AH annealing, that was to say that quenching promote the hydrogen annealing effects on polycrystalline La0.67Ba0.33MnO3 compound.",

keywords = "Defect and oxygen content, Hydrogen annealing, Manganite",

author = "Yimin Cui and Liuwan Zhang and Rongming Wang",

year = "2007",

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doi = "10.1016/j.jallcom.2006.03.058",

language = "英语",

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pages = "40--43",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

number = "1-2",

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TY - JOUR

T1 - Quenching-promoted anomalous electromagnetic behaviors of polycrystalline La0.67Ba0.33MnO3 compound by hydrogen annealing

AU - Cui, Yimin

AU - Zhang, Liuwan

AU - Wang, Rongming

PY - 2007/1/31

Y1 - 2007/1/31

N2 - Anomalous annealing behaviors of insulator-metal transition temperature (TP) and ac magnetic susceptibility were investigated in different prepared polycrystalline La0.67Ba0.33MnO3 bulk samples which were annealed in a flow of 95%Ar:5%H2(AH) at 700 °C for different time, and the behaviors were effects of oxygen loss and Ba ion vacancies. The experiments indicated that different prepared samples had different speed of oxygen loss and Ba ion vacancies during AH annealing. Different prepared samples had different content of structure defects, especially for the quenching samples, in which there were high stress and high defect content, the speed of oxygen loss and Ba2+ vacancies were the fastest during AH annealing, that was to say that quenching promote the hydrogen annealing effects on polycrystalline La0.67Ba0.33MnO3 compound.

AB - Anomalous annealing behaviors of insulator-metal transition temperature (TP) and ac magnetic susceptibility were investigated in different prepared polycrystalline La0.67Ba0.33MnO3 bulk samples which were annealed in a flow of 95%Ar:5%H2(AH) at 700 °C for different time, and the behaviors were effects of oxygen loss and Ba ion vacancies. The experiments indicated that different prepared samples had different speed of oxygen loss and Ba ion vacancies during AH annealing. Different prepared samples had different content of structure defects, especially for the quenching samples, in which there were high stress and high defect content, the speed of oxygen loss and Ba2+ vacancies were the fastest during AH annealing, that was to say that quenching promote the hydrogen annealing effects on polycrystalline La0.67Ba0.33MnO3 compound.

KW - Defect and oxygen content

KW - Hydrogen annealing

KW - Manganite

UR - https://www.scopus.com/pages/publications/33845685589

U2 - 10.1016/j.jallcom.2006.03.058

DO - 10.1016/j.jallcom.2006.03.058

M3 - 文章

AN - SCOPUS:33845685589

SN - 0925-8388

VL - 428

SP - 40

EP - 43

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Quenching-promoted anomalous electromagnetic behaviors of polycrystalline La_0.67Ba_0.33MnO₃ compound by hydrogen annealing

Abstract

Keywords

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