Hot-pressed Mn-Zn ferrite for magnetic recording heads

Hirota, Eiichi; Mihara, Toshihiro; Ikeda, Akio; Chiba, Hisayoshi

doi:10.1109/tmag.1971.1067090

Cited by 22 publications

(3 citation statements)

References 3 publications

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“…10 tun Figure 11. The hexagonal thin plateleta of a-Fe20a for (111) axis of the grain-oriented hot-press ferrite.…”

Section: Hot-press Ferrite Production Methodsmentioning

confidence: 99%

“…The Ni-Zn ferrite has a higher electrical resistivity and is easier to machine because of its hardness. Hot-press sintered ferrites of both Ni-Zn and Mn-Zn ferrite were developed (11,42,47,58) for magnetic recording heads after the above ferrites. The hot-press sintered ferrites are put to practical use in many varieties of magnetic recording heads (12-16^23^24) because of their easy fabrication in terms of obtaining high dense bodies with a porosity of less than 0.1%.…”

Section: Introductionmentioning

confidence: 99%

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Hot-pressed ferrites for magnetic recording heads

Hirota¹,

Sugimura²,

Hirota³

1984

Ind. Eng. Chem. Prod. Res. Dev.

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Hot-press ferrites in both Mn-Zn ferrite and Ni-Zn ferrite composition are reviewed. They are used as magnetic head cores.Production methods and the properties of hot-press ferrites are presented. Head performance, i.e., wear resistance, surface crumbling, and signal output scattering, etc., depends upon the magnetic properties and the microstructures of the sintered ferrite. To make these heads perform better, grain oriented Mn-Zn hot-press ferrites were developed, with either (111) or (110) axes, or both grain axes oriented. Also, some newly developed Mn-Zn hot-press ferrites are shown. One has a small grain size (~1 0 pm) to meet the demand for the narrow track width head with high recording density. Another consists of small grains (~1 0 pm) and grain boundaries with improved mechanical strength. It can withstand the severe machining process of the head fabrication. A third Mn-Zn hot-press ferrite has high saturation magnetization (Bt ~580 mT).

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“…10 tun Figure 11. The hexagonal thin plateleta of a-Fe20a for (111) axis of the grain-oriented hot-press ferrite.…”

Section: Hot-press Ferrite Production Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hot-pressed ferrites for magnetic recording heads

Hirota¹,

Sugimura²,

Hirota³

1984

Ind. Eng. Chem. Prod. Res. Dev.

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“…There are nevertheless special applications where cost is not of primary importance. Examples of materials where hot-pressing has been successfully applied are: optically transparent materials, Y2 03 (222), SC203 (190), and CaF2 (6); dense ferrites for recording heads (223,224); low-loss ferrites (208); transparent piezoelectrics (7,8) for electro-optical devices; magneto-optic materials (225,226); thermoelectric elements (227,228); and piezoe lectrics for application at very high frequencies (229).…”

Section: Advances In Hot-pressingmentioning

confidence: 99%