Observation of the Spin-Glass Behavior in Co-Based Antiperovskite Nitride GeNCo3

Lin Zu; Shuai Lin; Jianchao Lin; Bin Yuan; Xucai Kan; Peng Tong; Wenhai Song; Yuping Sun

doi:10.1021/acs.inorgchem.6b01462

Observation of the Spin-Glass Behavior in Co-Based Antiperovskite Nitride GeNCo3

Inorg Chem. 2016 Sep 19;55(18):9346-51. doi: 10.1021/acs.inorgchem.6b01462. Epub 2016 Aug 30.

Authors

Lin Zu¹, Shuai Lin, Jianchao Lin, Bin Yuan, Xucai Kan¹, Peng Tong, Wenhai Song, Yuping Sun²

Affiliations

¹ University of Science and Technology of China , Hefei 230026, People's Republic of China.
² Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, People's Republic of China.

PMID: 27572498
DOI: 10.1021/acs.inorgchem.6b01462

Abstract

Single-phase antiperovskite nitride GeNCo3 with space group Pm3̅m is successfully synthesized by a solid-gas reaction. The crystal structure, magnetism, specific heat at low temperatures, Hall effect, and electrical and thermal transport properties are widely investigated. Exhilaratingly, a canonical spin-glass (SG) behavior is observed in GeNCo3 with a freezing temperature T0 = 79.43 K, dynamical exponent zν = 6.156, and flipping time τ0 = 5.0 × 10(-12) s. The origin of the SG state in GeNCo3 is likely due to the atomic disorder introduced by the Ge vacancies. This is further proven by the measurements of Ge0.9NCo3 with more Ge deficiencies.