微晶
多铁性
材料科学
磁化
透射电子显微镜
电场
单晶
扫描电子显微镜
晶体结构
结晶学
衍射
磁电效应
凝聚态物理
分析化学(期刊)
核磁共振
磁场
铁电性
纳米技术
光学
光电子学
化学
复合材料
冶金
物理
量子力学
电介质
色谱法
作者
Shigeo Hirose,Daisuke Urushihara,Toru Asaka,T. Kimura
摘要
The crystal structure and the magnetoelectric (ME) effect were investigated in highly c-axis oriented polycrystalline samples of Y-type hexaferrite, BaSrCo2Fe11AlO22, fabricated using a rotating magnetic field. A detailed crystal structure was determined using a combination of scanning transmission electron microscopy and single crystal x-ray diffraction. It was revealed that Co and Al ions, which play important roles in the performance of the ME effect, reside mainly on the Fe site in the S block of the Y-type hexaferrite. In the oriented samples, electric polarization induced by applying a magnetic field reached 140 μC/m2 at 200 K and 51 μC/m2 at 300 K; consequently, the ME coefficient αH was estimated to be 7200 ps/m at 300 K. The ME performance of the oriented samples is superior to that of nonoriented polycrystalline samples and comparable with that of single crystals. Furthermore, the oriented samples allow the control of magnetization by an electric field up to 325 K. These results facilitate further investigations on room-temperature multiferroics and their practical applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI