Room-temperature ferromagnetism with high magnetic moment in Cu-doped AlN single crystal whiskers

Ferromagnetism is investigated in high-quality Cu-doped A1 N single crystal whiskers.The whiskers exhibit roomtemperature ferromagnetism with a magnetic moment close to the results from first-principles calculations.High crystallinity and low Cu concentrations are found to be indispensable for high...

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Published inChinese physics B Vol. 24; no. 2; pp. 414 - 418
Main Author 姜良宝 刘宇 左思斌 王文军
Format Journal Article
LanguageEnglish
Published 01.02.2015
Subjects
AlN
Aluminum nitride
Copper
Crystallinity
Ferromagnetism
Magnetic moment
Mathematical analysis
Single crystals
Vacancies
单晶
室温
晶须
磁矩
第一原理计算
铁磁性
铜掺杂
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/24/2/027503

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Summary:Ferromagnetism is investigated in high-quality Cu-doped A1 N single crystal whiskers.The whiskers exhibit roomtemperature ferromagnetism with a magnetic moment close to the results from first-principles calculations.High crystallinity and low Cu concentrations are found to be indispensable for high magnetic moments.The difference between the experimental and theoretical moment values is explored in terms of the influence of nitrogen vacancies.The calculated results demonstrate that nitrogen vacancies can reduce the magnetic moments of Cu atom.
Bibliography:spintronics, defects, nitrides, first-principles calculations
Jiang Liang-Bao, Liu Yu, Zuo Si-Bin, and Wang Wen-Jun（ Research ＆ Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China）
Ferromagnetism is investigated in high-quality Cu-doped A1 N single crystal whiskers.The whiskers exhibit roomtemperature ferromagnetism with a magnetic moment close to the results from first-principles calculations.High crystallinity and low Cu concentrations are found to be indispensable for high magnetic moments.The difference between the experimental and theoretical moment values is explored in terms of the influence of nitrogen vacancies.The calculated results demonstrate that nitrogen vacancies can reduce the magnetic moments of Cu atom.
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/24/2/027503