Spin-glass state in the mixed system (Co1−xFex)2(OH)3Cl on deformed pyrochlore lattice

✍ Scribed by M. Fujihala; M. Hagihala; X.G. Zheng; T. Kawae

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 546 KB
• Volume: 404
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2008.11.166

✦ Synopsis

Magnetic interactions in a new geometrically frustrated system (Co 1Àx Fe x ) 2 (OH) 3 Cl are investigated using magnetic susceptibility and mSR study. While Co 2 (OH) 3 Cl is ferromagnetic and Fe 2 (OH) 3 Cl antiferromagnetic, the partially substituted series (Co 1Àx Fe x ) 2 (OH) 3 Cl show spin-glass behaviours, wherein ferromagnetic interactions prevail for low Fe concentration and antiferromagnetic ones prevail for high Fe concentration. In special, analysis of the AC magnetic susceptibility and ZF-m + SR for the x ¼ 0.5 sample suggest that CoFe(OH) 3 Cl has both features of chemically disordered random spin glass and geometrically frustrated spin glass. It is also the first spin-glass system for the newly found geometric frustration series M 2 (OH) 3 X.