应《网络安全法》要求，自2017年10月1日起，未进行实名认证将不得使用互联网跟帖服务。为保障您的帐号能够正常使用，请尽快对帐号进行手机号验证，感谢您的理解与支持！

24小时热门版块排行榜    

小木虫论坛-学术科研互动平台 » 材料区 » 功能材料 » 功能薄膜 » BiFeO3 薄膜的磁电系数是多大？
51/1返回列表
查看: 439  |  回复: 2
只看楼主 @他人 存档 新回复提醒 (忽略) 收藏    在APP中查看
当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖

lmcr

铜虫 (小有名气)

[求助] BiFeO3 薄膜的磁电系数是多大？ 已有1人参与

请问到目前为止，BiFeO3或者doped BFO 的磁电系数有多大？
回复此楼

» 猜你喜欢

» 本主题相关价值贴推荐，对您同样有帮助:
1楼 2013-11-24 02:27:56
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

huichangniu

木虫 (正式写手)

【答案】应助回帖

mjx150: 回帖很有用 2014-02-24 09:40:08
0.52 (ps/m)   linear ME coefficient: lower limit, measured under 18 K
文献 Rivera J P, Schmid H. On the birefringence of magnetoelectric BiFeO3[J]. Ferroelectrics, 1997, 204: 23-33.
赞一下 回复此楼
3楼2014-02-23 20:27:43
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 3 个回答

wangxx69

铁虫 (初入文坛)

【答案】应助回帖

感谢参与，应助指数 +1
mjx150: 感谢交流 2014-02-24 09:39:54
In-plane dielectric and magnetoelectric studies of BiFeO3[Advanced Materials Physics]
Ashok Kumar, J. F. Scott, R. Martínez, G. Srinivasan, and R. S. Katiyar

The in-plane temperature dependent dielectric behavior of BiFeO3 (BFO) as-grown thin films shows diffuse but prominent phase transitions near 450 (±10) K and 550 K with dielectric-loss temperature dependences that suggest skin layer effects. The 450 K anomalies are near the “transition” first reported by Polomska et al. [Phys. Status Solidi 23, 567 (1974)]. The 550 K anomalies coincide with the surface phase transition recently reported by Xavi et al. [Phys. Rev. Lett. 106, 236101 (2011)]. In addition, anomalies are found at low temperatures: After several experimental cycles the dielectric loss shows a clear relaxor-like phase transition near what was previously suggested to be a spin reorientation transition (SRT) temperature (～201 K) for frequencies 1 kHz < f < 1 MHz which follow a nonlinear Vogel–Fulcher (V–F) relation; an additional sharp anomaly is observed near ～180 K at frequencies below 1 kHz. As emphasized recently by Cowley et al. [Adv. Phys. 60, 229 (2011)], skin effects are expected for all relaxor ferroelectrics. Using planar interdigital electrodes, Kumar et al. present experimental data and a theoretical model for the in-plane longitudinal and transverse direct magnetoelectric (ME) coefficients. Reasonably good ME coefficients (～300 mV/Oe cm in transverse and 2 V/Oe cm in longitudinal direction) are measured. Understanding of the in-plane phase transitions and ME behaviour may be helpful to design nanoscale and interfacial devices with high surface to volume ratios.

Phys. Status Solidi A (2012) DOI 10.1002/pssa.201228154
赞一下 回复此楼
菠萝文尼亚
2楼2013-11-24 10:34:07
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 3 个回答
普通表情 龙 兔 虎 猫
信息提示
关闭
请填处理意见
关闭