کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1798043 | 1524803 | 2016 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Isovalent Bi3+ substitution induced structural and magnetic transitions in LaMnO3 Isovalent Bi3+ substitution induced structural and magnetic transitions in LaMnO3](/preview/png/1798043.png)
Rare earth perovskite manganites have attracted renewed attention due to scientific aspect and prospective device applications. This work explores the structural and magnetic properties of La(1−x)BixMnO3 (x=0–0.5) with isovalent Bi3+ ions substituted at the La3+site synthesized through solid state reaction method. Doping of ‘Bi3+’ in LaMnO3 induces transition from orthorhombic to cubic phase for x≥ 0.3. Decrease in the magnetic transition temperature in ZFC-FC data is correlated to the distortion induced by ‘Bi3+’ doping. Spin glass like feature is witnessed in orthorhombic phase and it diminished appreciably for x≥0.3 in the cubic symmetry. At 10 K, coercivity decreases in orthorhombic phase, whereas it increases marginally in cubic phase. Thus, isovalent Bi3+ doping in LaMnO3 is found to induce structural change from orthorhombic to cubic which is also reflected in the magnetic properties as a change over from hard to soft magnetic phase. In addition, a phenomenological model is applied for fitting the field cooled magnetization data. The results of fitting and the related magneto-caloric effect are also discussed in this paper.
Journal: Journal of Magnetism and Magnetic Materials - Volume 418, 15 November 2016, Pages 68–75