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Vol.43.No.2(66) >

 
Title :アタカマイトCu2Cl(OH)3のプロトンNMR
Authors :善明 和子
久保 英範
時田 正彦
浜崎 達一
萩原 雅人
鄭 旭光
河江 達也
竹内 祐樹
松村 政博
ゼンミョウ カズコ
クボ ヒデノリ
トキタ マサヒコ
ハマサキ タツイチ
ハギワラ マサト
テイ キョクコウ
カワエ タツヤ
タケウチ ユウキ
マツムラ マサヒロ
Kazuko ZENMYO
Hidenori KUBO
Masahiko TOKITA
Tatsuichi HAMASAKI
Masato HAGIHALA
Xu-Guang ZHENG
Tatsuya KAWAE
Yuuki TAKEUCHI
Masahiro MATSUMURA
Issue Date :Feb-2011
Abstract :The proton NMR spectrum of Cu2Cl(OH)3 at low temperature with zero external field has two sharp peaks. This result means that the majority of magnetic moments antiferromagnetically order at low temperature. The magnetic structure determined by comparison with the observed proton NMR spectrum and the numerical calculated ones of various magnetic models shows that the magnetic moments order all-in all-out orienting to body center like antiferromagnetic pyrochlore. The sufficient evidence of the disordering or spin-glass moments for back ground is not detected from observed NMR spectrum. The magnetic structure of atacamite Cu2Cl(OH)3 is different from the atacamite of the same kind, Mn2Cl(OH)3, although it has same crystal structure. However, the temperature dependences of the peak frequencies show the unusual behavior which fall down quickly at the considerable lower temperature than TN. This result may suggest that the antiferromagnetically ordered moments begin to fluctuate at the low temperature due to the competing exchange interaction.
Type Local :紀要論文
ISSN :02876620
Publisher :福岡工業大学附属図書館
URI :http://hdl.handle.net/11478/1310
citation :福岡工業大学研究論集
43
2
87
92
Citation :福岡工業大学研究論集 Vol.43 no.2 p.87 -92
Appears in Collections:Vol.43.No.2(66)

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