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Paper detail

Realization of giant magnetoelectricity in helimagnets

We show that low field magnetoelectric (ME) properties of helimagnets Ba0.5Sr1.5Zn2(Fe1-xAlx)12O22 can be efficiently tailored by Al-substitution level. As x increases, the critical magnetic field for switching electric polarization is systematically reduced from ~1 T down to ~1 mT, and the ME susceptibility is greatly enhanced to reach a giant value of 2.0 x 10^4 ps/m at an optimum x = 0.08. We find that control of nontrivial orbital moment in the octahedral Fe sites through the Al-substitution is crucial for fine tuning of magnetic anisotropy and obtaining the conspicuously improved ME characteristics.

preprint2010arXivOpen access
Sae Hwan ChunYi Sheng ChaiYoon Seok OhDeepshikha Jaiswal-NagarSo Young HaamIngyu KimBumsung LeeDong Hak NamKyung-Tae KoJae-Hoon ParkJae-Ho ChungKee Hoon Kim
cond-mat.str-elcond-mat.mtrl-sci
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Sae Hwan ChunYi Sheng ChaiYoon Seok OhDeepshikha Jaiswal-NagarSo Young HaamIngyu KimBumsung LeeDong Hak NamKyung-Tae KoJae-Hoon ParkJae-Ho ChungKee Hoon Kim

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