Texture formation in W-type hexaferrite by cold compaction of non-magnetic interacting anisotropic shaped precursor crystallites

Abstract

Crystallites of the W-type hexaferrite, Sr(Ni1-xZnx)2Fe16O27 (x = 0, 0.5, 1) have been aligned without applying magnetic field nor hot compaction, but through a simple synthesis process taking advantages of...

Oriented Nanomagnets Originating from Topotactic and Pseudomorphic Reactions

“…The refinements show that it is possible to preserve texture through the solid-state reaction from goethite → hematite → hexaferrite. In agreement with literature, 15,16,19 a "high" texture index is indicative of a higher squareness factor (M r /M s ). Furthermore, the M r /M s is similar to similar to our other 31 Heatmap for the calculated model is shown for (d) goethite and strontium carbonate, (e) hematite and strontium carbonate, and (f) hexaferrite and sodium ferrite.…”

“…This descriptor expresses a deviation from a random uniform distribution of crystallite orientations. When crystallites are no longer randomly distributed, the directional properties of many materials can be enhanced, for example, structural materials, − battery materials, , superconductors, , piezoelectric materials, thermoelectric materials, or the materials in focus in this paper: permanent magnets. − …”

Influences of divalent ion substitution on the magnetic and dielectric properties of W-type barium ferrite

“…The observed low coercivity can be attributed to the overgrowth of crystals at high sintering temperature, which induces a multi-domain character, leading to the disappearance of H c . [32] Except for the Co 2 W sample, the variation of the coercivity is in general agreement with the results of the grain size variation derived from the SEM images. In addition, the coercivity is also affected by the anisotropic field.…”