Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8161830 | Physica B: Condensed Matter | 2016 | 6 Pages |
Abstract
Antiperovskite intermetallic Mn3âxCrxZnN (0â¤xâ¤0.5) compounds have been prepared to study the Cr doping effect on the electronic transport properties. The temperature dependent resistivity Ï(T) for xâ¤0.3 shows notable and broader slope change. Meanwhile, with increasing Cr doping, the slope change shifts to lower temperatures and is gradually suppressed for x>0.3. For x=0.0 and 0.5, the measurements of magnetization from 10 K to 350 K reveal that Mn3âxCrxZnN compounds go through a transition from the dominant AFM interactions to one where the FM and AFM interactions coexist. For low-temperature region (15-80 K), the electron-electron scattering is dominant, and the number of phonons abruptly increases with increasing temperature. Small polaron hopping model (SPH) is used to understand the temperature dependence of electrical resistivity in the high-temperature range of 200-300 K and a clear decrease of the polaron activation energy was observed for xâ¤0.2. The residual resistivity ratio (RRR) decreases while the residual resistivity increases (Ï0) with increasing Cr-doping level. The maximum total entropy change (ÎSmax) decreases by increasing the Cr doping from x=0.0 to 0.2.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Muhammad Imran Malik, Ying Sun, Lei Wang, Sihao Deng, Kewen Shi, Pengwei Hu, Huiqing Lu, Cong Wang,