Publication Date:
2015-04-09
Description:
We have experimentally investigated the correlation between the magnetoelectric coupling α and Co substitutions in M-type hexaferrite films. Specifically, the following family of M-type hexaferrites materials were investigated Sr 2 + Co x 2 + Ti 3 − 0.5 x 4 + Fe 8 3 + O 19 2 − , where x varied from 1.2 to 3.5. The parameter α was measured for the cases (a) the induced magnetization was perpendicular, α ⊥ , and (b) parallel, α ∥ , to the applied electric field. A maximum value of α ⊥ = 1.01 × 10 −8 sec / m was measured for x = 1.65. This optimum value may be related to the maximum packing density of cobalt ions in octahedral sites and still maintain charge neutrality. Also, α ∥ reached a minimum value of 2.51 × 10 −10 sec / m for x = 1.9.
Print ISSN:
0003-6951
Electronic ISSN:
1077-3118
Topics:
Physics
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