Realization of giant magnetoelectricity in helimagnets
Physical review letters, 2010•APS
We show that low field magnetoelectric (ME) properties of helimagnets Ba 0.5 Sr 1.5 Zn 2
(Fe 1-x Al x) 12 O 22 can be efficiently tailored by the 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× 10 4 ps/m at an optimum x= 0.08. We find that control of the nontrivial orbital moment in
the octahedral Fe sites through the Al substitution is crucial for fine-tuning the magnetic …
(Fe 1-x Al x) 12 O 22 can be efficiently tailored by the 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× 10 4 ps/m at an optimum x= 0.08. We find that control of the nontrivial orbital moment in
the octahedral Fe sites through the Al substitution is crucial for fine-tuning the magnetic …
We show that low field magnetoelectric (ME) properties of helimagnets can be efficiently tailored by the Al-substitution level. As increases, the critical magnetic field for switching electric polarization is systematically reduced from down to , and the ME susceptibility is greatly enhanced to reach a giant value of at an optimum . We find that control of the nontrivial orbital moment in the octahedral Fe sites through the Al substitution is crucial for fine-tuning the magnetic anisotropy and obtaining the conspicuously improved ME characteristics.
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