Journal
PHYSICAL REVIEW B
Volume 80, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.180419
Keywords
barium compounds; dielectric hysteresis; ferrites; magnesium compounds; magnetic structure; magnetic transitions; multiferroics; neutron diffraction
Funding
- MEXT, Japan [19052001]
- Grants-in-Aid for Scientific Research [19052001] Funding Source: KAKEN
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The magnetic phase diagram of the Y-type hexaferrite Ba2Mg2Fe12O22 has been studied using single-crystal neutron diffraction. The result indicates successive phase transitions where the magnetic modulation wave number changed discontinuously when a magnetic field is applied and the temperature is varied. For the low-temperature spin-driven ferroelectric state, we have found a sixfold structure with q=(0 0 1/2) in weak magnetic fields and a twofold structure with q=(0 0 3/2) in strong magnetic fields between which a first-order transition intervenes accompanied by a hysteresis.
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