کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1642519 | 1517233 | 2015 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of oxygen vacancy on the magnetic and electric properties in MnTiO3 ceramics Effect of oxygen vacancy on the magnetic and electric properties in MnTiO3 ceramics](/preview/png/1642519.png)
We conducted a comparative study on structural, magnetic and electric properties of MnTiO3 ceramics sintered in air (MTO-A) and nitrogen (MTO-N) to explore the impact of oxygen vacancies (OVs) on them. The X-ray diffraction patterns show that MTO-N possesses a lattice contraction induced by OVs comparing with MTO-A. Distinct spin glass (SG) with Tsg (41 K) and magnetic exchange bias (EB) are only observed in the MTO-N sample. The results indicate that OVs may well lead to the enhanced magnetization, thereby generating SG behavior. Moreover, the dielectric characteristics of MTO-A and MTO-N are investigated additionally, two disparate relaxation mechanisms of Maxwell–Wagner relaxation and OVs migration are illuminated respectively, which further support the vital function of OVs.
Journal: Materials Letters - Volume 155, 15 September 2015, Pages 71–74