This paper describes the relationship between magnetic properties and microstructure in Mn-Ni-N sintered alloys. The Mn-Ni-N alloy heat-treated at 1200 °C for 3 h and then jacket-quenched in a nitrogen atmosphere, exhibits a high coercivity of 352 kAm-1. The EDX analysis reveals that the sample jacket-quenched and then annnealed in nitrogen, consists of two phases with different Ni content forming a lamellar structure. From TEM observations, the jacket-quenched sample contains many stacking faults and twins with nano-meter size. Therefore, it is considered that they play a role as pinning sites of domain wall motion and high coercivity observed with the quenched sample is casued by the domain wall pinning mechanism.
|Number of pages||4|
|Journal||Physica Status Solidi (C) Current Topics in Solid State Physics|
|Publication status||Published - 2007 Dec 1|
|Event||International Symposium on Advanced Magnetic Materials and Appilications, (ISAMMA 2007) - Jeju, Korea, Republic of|
Duration: 2007 May 28 → 2007 Jun 1
ASJC Scopus subject areas
- Condensed Matter Physics