Orientation Superstructures and their Effects in Spinel Ferrites
- 1 January 1967
- journal article
- research article
- Published by Wiley in Physica Status Solidi (b)
- Vol. 24 (2) , 635-649
- https://doi.org/10.1002/pssb.19670240226
Abstract
Orientation superstructures are examined using the magnetic diffusion after‐effect, the squareness ratio R, and the induced anisotropy Ku, in the ferrites: Mn0.2Fe2.8O4.014, CuxMg1−xFe2O4 (0.09 ≦ x ≦ 0.69), Mn1+xO4 (0.1 ≦ x ≦ 0.8) and Fe1.95Ni0.95Cox× × Zn0.1−xO4 (0.02 ≦ x ≦ 0.1). In the temperature zones where disaccommodation occurs (due to the ionic or electronic diffusion), a uniaxial anisotropy can be formed with a corresponding increase of R. It is shown that a new type of electron transfer: Cu+ ↔ Cu2+ is responsible for the magnetic after‐effect in Mg‐Cu ferrites.Keywords
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