Electric field control of nonvolatile four-state magnetization at room temperature.
We find the realization of large converse magnetoelectric (ME) effects at room temperature in a magnetoelectric hexaferrite Ba0.52Sr2.48Co2Fe24O41 single crystal, in which rapid change of electric polarization in low magnetic fields (about 5 mT) is coined to a large ME susceptibility of 3200 ps/m. The modulation of magnetization then reaches up to 0.62μ(B)/f.u. in an electric field of 1.14 MV/m. We find further that four ME states induced by different ME poling exhibit unique, nonvolatile magnetization versus electric field curves, which can be approximately described by an effective free energy with a distinct set of ME coefficients.
CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul, Korea. pokchun@snu.ac.kr
Sae Hwan
SH
Chun
Yi Sheng
YS
Chai
Byung-Gu
BG
Jeon
Hyung Joon
HJ
Kim
Yoon Seok
YS
Oh
Ingyu
I
Kim
Hanbit
H
Kim
Byeong Jo
BJ
Jeon
So Young
SY
Haam
Ju-Young
JY
Park
Suk Ho
SH
Lee
Jae-Ho
JH
Chung
Jae-Hoon
JH
Park
Kee Hoon
KH
Kim