کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1859790 | 1037375 | 2010 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Size-dependent spin-reorientation transition in Nd2Fe14B nanoparticles Size-dependent spin-reorientation transition in Nd2Fe14B nanoparticles](/preview/png/1859790.png)
It is well known that some ferromagnetic properties like Curie temperature are size dependent. In this Letter we will report that the spin-reorientation temperature of Nd2Fe14B material is also size dependent. By using a surfactant-assisted ball milling technique, Nd2Fe14B nanoparticles with different size about 6, 20 and 300 nm were successfully obtained. Spin-reorientation transition temperature of the NdFeB nanoparticles was then determined by measuring the temperature dependence of DC and AC magnetic susceptibility. It was revealed that the spin-reorientation transition temperature (TsrTsr) of the nanoparticles is strongly size dependent. TsrTsr of the 300 nm particles is lower than that of the bulk raw material while the TsrTsr of the 20 nm particles is significantly lower than that for the 300 nm particles. The physics behind this size dependence is discussed.
Journal: Physics Letters A - Volume 374, Issue 38, 23 August 2010, Pages 3967–3970