Spin-glass behavior in the antiperovskite manganese nitride codoped with Ge and Si

✍ Scribed by Rongjin Huang; Laifeng Li; Zhixiong Wu; Xinxin Chu; Xiangdong Xu; Lihe Qian

• Book ID: 104093905
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 395 KB
• Volume: 150
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/j.ssc.2010.06.041

✦ Synopsis

Antiperovskite manganese nitrides Mn 3 (Cu 0.6 Si x Ge 0.4-x )N (x = 0.05, 0.1, 0.15) were prepared and their negative thermal expansion, magnetic and specific heat properties were investigated. A frozen state with a freezing temperature was found at ∼207 K in Mn 3 (Cu 0.6 Si 0.15 Ge 0.25 )N. This indicates that Mn 3 (Cu 0.6 Si 0.15 Ge 0.25 )N exhibits a spin glass state at low temperatures. We discussed the cause of spin glass behavior and correlated this spin glass behavior with broadening of the negative thermal expansion operation-temperature window of the manganese nitrides Mn 3 (Cu 0.6 Si 0.15 Ge 0.25 )N.