%0 Journal Article
%T 铁酸钐陶瓷的微结构和磁性能<br>Microstructure and Magnetic Properties of SmFeO<sub>3</sub> Ceramics
%A 韩新
%A 李正法
%A 林旭
%J Metallurgical Engineering
%P 71-76
%@ 2373-1486
%D 2020
%I Hans Publishing
%R 10.12677/MEng.2020.72011
%X 以三氧化二铁和氧化钐为原材料，采用固态烧结的方法制备得到SmFeO<sub>3</sub>陶瓷，并通过XRD，SEM、AFM、MFM，MPMS-VSM等手段对其相、微结构以及磁性能进行表征。结果表明：SmFeO<sub>3</sub>陶瓷晶粒相对均匀且致密，并且在晶粒表面可以观察到宽度为20 nm的条纹畴结构。另外，在室温下，SmFeO<sub>3</sub>的磁滞回线呈狭窄的矩形，在饱和磁场H<sub>s</sub>为49999.53 Oe下饱和磁化强度M<sub>s</sub>为1.06 emu/g。施加0.1 T的外磁场时，SmFeO<sub>3</sub>的磁化强度从室温一直增强直到自旋重组转变温度T<sub>SR</sub>~480 K附近，在奈尔温度T<sub>N</sub>~700 K附近迅速降至零，此时，SmFeO<sub>3</sub>从反铁磁性转变成顺磁性。<br />
SmFeO<sub>3</sub> ceramics were prepared by solid state sintering using Fe<sub>2</sub>O<sub>3</sub> and Sm<sub>2</sub>O<sub>3</sub> as raw materials. And its phase, microstructure and magnetic properties were characterized by XRD, SEM, AFM, MFM and MPMS-VSM. The results show that the ceramic grains of SmFeO<sub>3</sub> with pure phase are relatively uniform and compact, and the rope-type nano domain structure with the ferroelectric domain width of 20 nm can be observed on grain surfaces. At room temperature, SmFeO<sub>3</sub> exhibits a narrow rectangular saturated magnetic hysteresis loop with saturated magnetization M<sub>s</sub> of 1.06 emu/g under the saturated magnetic field H<sub>s</sub> of 49999.53 Oe. Under the external magnetic field of 0.1 T, the magnetization of SmFeO<sub>3</sub> increases up to the spin reorientation transition temperature T<sub>SR</sub> about 480 K, and rapidly decreases to zero at the Néel temperature T<sub>N</sub> of 700 K, where SmFeO<sub>3</sub> transforms from antiferromagnetism to paramagnetism.
%K 陶瓷，微结构，磁性能<br>Ceramic
%K Microstructure
%K Magnetic Properties
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=35513