کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1810293 | 1525235 | 2013 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Magnetic enhancement across a ferroelectric–paraelectric phase boundary in Bi1−xSmxFeO3 Magnetic enhancement across a ferroelectric–paraelectric phase boundary in Bi1−xSmxFeO3](/preview/png/1810293.png)
Structural, vibrational, and magnetic properties of Bi1−xSmxFeO3 (0≤x≤0.20) are investigated by using x-ray powder diffraction, Raman scattering, and magnetometry techniques. We show that the rare-earth ion Sm substitution at Bi site, serving chemical pressure, causes the structural transformation from rhombohedral R3c phase to orthorhombic Pnma phase at x∼0.15, accompanying with the ferroelectric–paraelectric transition. The magnetization is found to be enhanced initially with Sm substitution increasing before approaching ferroelectric–paraelectric boundary but it slightly decreases after passing a maximum. The enhanced magnetization is suggested to stem from the combined effects of the suppressed spin cycloids and increased degree of canting and magnetic interactions between magnetic ions.
Journal: Physica B: Condensed Matter - Volume 411, 15 February 2013, Pages 106–109