CAJ | 학술논문

采用磁控溅射技术制备了 T b／Fe50 M n50 n多层膜，用 Versalab振动样品磁强计测量薄膜样品在不同温度下的磁滞回线，研究了 T b／Fe50 M n50 n多层膜体系矫顽力和温度、薄膜层数及反铁磁层厚度的关系，以及薄膜铁磁层与反铁磁层界面耦合作用和铁磁层的层间耦合作用。研究发现铁磁层与反铁磁层的界面耦合作用随温度升高而增加，且存在随薄膜厚度增加而增大的转变温度 Tt 。当 T＜ Tt 时，界面耦合使矫顽力减小；当T＞ Tt时，使矫顽力增大。铁磁层的层间耦合作用随反铁磁层厚度在铁磁耦合和反铁磁耦合之间振荡变化，当T＜ Tt时耦合作用强度随温度增加而减小，但当 T＞ Tt时，耦合作用突然增强。
채용자공천사기술제비료 T b／Fe50 M n50 n다층막，용 Versalab진동양품자강계측량박막양품재불동온도하적자체회선，연구료 T b／Fe50 M n50 n다층막체계교완력화온도、박막층수급반철자층후도적관계，이급박막철자층여반철자층계면우합작용화철자층적층간우합작용。연구발현철자층여반철자층적계면우합작용수온도승고이증가，차존재수박막후도증가이증대적전변온도 Tt 。당 T＜ Tt 시，계면우합사교완력감소；당T＞ Tt시，사교완력증대。철자층적층간우합작용수반철자층후도재철자우합화반철자우합지간진탕변화，당T＜ Tt시우합작용강도수온도증가이감소，단당 T＞ Tt시，우합작용돌연증강。
The hysteresis loops of Tb/Fe50 Mn50 multilayers which are fabricated by dc magnetron sputtering are measured by Vibrating Sample Magneto (Versalab) at different temperatures .This paper investigates the relations among the coercivity of Fe50 Mn50 ,temperature ,layers and the thickness of antiferromagnetic layer ,as well as the interface interactions between FM layer and AFM layer and the interlayer coupling between Tb layers .It is showed that the interface coupling gets stronger as the temperature increases ,and a transitional temperature Tt ,which increases with the thickness of the film ,is observed .Due to the interface coupling ,at T < Tt ,coercivity decreases ,and while at T > Tt ,coercivity increases .For the interlayer coupling ,it oscillates between magnetic coupling and antimagnetic coupling with the thickness of Fe50Mn50at T <Tt ,interlayer coupling decreases with increasing temperature ,and while at T > Tt ,interlayer coupling becomes stronger obviously .