Abstract
We show that low field magnetoelectric (ME) properties of helimagnets Ba0.5Sr1.5Zn2(Fe1-xAlx)12O22 can be efficiently tailored by the Al-substitution level. As x increases, the critical magnetic field for switching electric polarization is systematically reduced from ∼1T down to ∼1mT, and the ME susceptibility is greatly enhanced to reach a giant value of 2.0×104ps/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 anisotropy and obtaining the conspicuously improved ME characteristics.
Original language | English |
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Article number | 037204 |
Journal | Physical review letters |
Volume | 104 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2010 Jan 21 |
ASJC Scopus subject areas
- Physics and Astronomy(all)