Magnetic Origin of Giant Magnetoelectricity in Doped Y-type Hexaferrite Ba0.5Sr1.5Zn2(Fe1-xAlx)(12)O-22
SCIE
SCOPUS
- Title
- Magnetic Origin of Giant Magnetoelectricity in Doped Y-type Hexaferrite Ba0.5Sr1.5Zn2(Fe1-xAlx)(12)O-22
- Authors
- Noh, WS; Ko, KT; Chun, SH; Kim, KH; Park, BG; Kim, JY; Park, JH
- Date Issued
- 2015-03-19
- Publisher
- AMER PHYSICAL SOC
- Abstract
- We investigated site-specific magnetic behaviors of multiferroic Ba0.5Sr1.5Zn2(Fe1-xAlx)(12)O-22 using Fe L-2,L-3-edge x-ray magnetic circular dichroism. The Al dopants mostly replace the Fe3+ ions at octahedral (O-h) sites, which contribute unquenched angular momenta through off-centering displacements. This replacement greatly reduces the magnetic anisotropy energy to change the magnetic order from a helical to a heliconical type with enhanced magnetoelectric susceptibility (alpha(ME)). The tetrahedral (T-d) Fe sites exhibit magnetic hysteresis distinguishable from that of the O-h sites, especially at low magnetic fields. These results provide essential clues for the heliconical order with a giant aME and multibit memory effects in the Al-doped Y-type hexaferrite.
- Keywords
- WEAK FERROMAGNETISM; FERROELECTRICITY; MULTIFERROICS; POLARIZATION; HELIMAGNET
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/13016
- DOI
- 10.1103/PHYSREVLETT.114.117603
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- PHYSICAL REVIEW LETTERS, vol. 114, no. 11, 2015-03-19
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