Newly developed inductive write head with electroplated CoNiFe film

Ohashi, Keisuke; Yasue, Yoshihiko; Saito, Mikiko; Yamada, Kazuhiko; Osaka, Tetsuya; Takai, Madoka; Hayashi, Katsuyoshi

doi:10.1109/20.706583

Cited by 59 publications

(32 citation statements)

References 7 publications

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“…Recently, it has been reported that electrochemically prepared CoNiFe films can exhibit high Bs and excellent soft magnetic properties. One of the best films prepared has a composition of Co 65 Ni 12 Fe 23 with high Bs of 2.0 T and low Hc of 1.2 Oe This film has realized the targeted storage density of greater than 100 Gb/inch 2 in magnetic recording in the future [1][2][3]. In addition, magnetic properties are not only determined by the intrinsic properties, but also by the microstructure parameter such as grain size and crystalline structure.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The annealing temperature dependences of microstructures and magnetic properties in electro-chemical deposited CoNiFe thin films

Suharyadi

Riyanto²,

Abraha³

2016

AIP Conference Proceedings

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Section: Introductionmentioning

confidence: 99%

“…These parameters can be optimized by working, processing condition and post deposition treatment of material to achieve desired magnetic properties [4]. The important parameters for achieving such excellent properties is crystal structure which can be obtained by the compositional region between fcc and bcc structures [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

The annealing temperature dependences of microstructures and magnetic properties in electro-chemical deposited CoNiFe thin films

Suharyadi

Riyanto²,

Abraha³

2016

AIP Conference Proceedings

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“…To adopt materials with high K u , therefore, high H c , is an approach to improve the thermal stability of recording media [3] . However, this approach is limited because the values of H c must be lower than about half the maximum head write field in order for the head to be able to write the media in both longitudinal and perpendicular recording [4] . This dilemma has made a "slowing down" in areal density increases [5] .…”

Section: Introductionmentioning

confidence: 99%

Advanced hybrid recording media

Cheng

Jin

et al. 2005

SPIE Proceedings

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Abstract:Combining the advantages of hard-disk magnetic recording and magneto-optical recording, hybrid recording is regarded as promising candidate for extremely-high density recording technology beyond Tera bits/in 2 . To obtain such high areal density, hybrid recording media are required to have high coercivity and large remanent magnetization at room temperature, the desired temperature dependence of coercivity and magnetization, as well as very short thermal response time. Currently, the researches on the hybrid recording media mainly involve the magnetic hard-disk polycrystalline recording media and the magneto-optical amorphous media. This report presents the latest progresses in the researches on these two kinds of media for hybrid recording.

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“…NiCoFe ternary alloys, rich in Co, have been reported with higher saturation magnetic flux density and lower coercivity than Permalloy (Ni 80 Fe 20 ), which can be used to develop more sensitive thin film magnetic heads for high-density recording. [6][7][8][9][10][11][12][13][14][15][16][17][18][19] Also, NiCoFe ternary alloys, rich in Fe, have also been noted for their low thermal expansion property. Commercial applications of these alloys include microwave guides, spacecraft optics, laser housings, and printed wired boards.…”

Section: Introductionmentioning

confidence: 99%

Thermal Synthesis of Nanocrystalline (CoxNi1-x)yFe1-y KOVAR Alloy through Gaseous Reduction of Mixed Oxides

et al. 2008

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KOVAR is a very interesting and widely applied Fe-Ni-Co alloy. Nanocrystalline KOVAR alloy is successfully synthesized in the present investigation. The effect of hydrogen reduction on composition, microstructure and magnetic properties of produced Fe-Ni-Co alloy is investigated. A molar ratio of (99.9%) nickel oxide, cobalt oxide and ferric oxide for synthesis of 29% Ni-17% Co-Fe (KOVAR) alloy were thoroughly mixed and compressed into compacts. The dried compacts were reduced partially and completely at 500, 600, 700 and 800 C in a constant flowing hydrogen gas atmosphere (100% H 2 ). The course of reduction was followed up using the thermogravimetric technique to study the reduction behavior and kinetics reaction mechanism. The initial dried powder and the various reduction products were characterized by XRD, VSM, FE-SEM, EDX and reflected light microscope. At the higher reaction temperature (700-800 C) complete reduction was achieved with synthesis of nanocrystalline (13.9 nm) Fe-Ni-Co alloy. The activation energy values were calculated from the Arrhenius equation, and the approved mathematical formulations for the gas solid reaction were applied. It was found that the initial and final reduction stages are controlled by the combined gaseous diffusion and interfacial chemical reaction mechanisms.

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Newly developed inductive write head with electroplated CoNiFe film

Cited by 59 publications

References 7 publications

The annealing temperature dependences of microstructures and magnetic properties in electro-chemical deposited CoNiFe thin films

The annealing temperature dependences of microstructures and magnetic properties in electro-chemical deposited CoNiFe thin films

Advanced hybrid recording media

Thermal Synthesis of Nanocrystalline (Co<SUB>x</SUB>Ni<SUB>1-x</SUB>)<SUB>y</SUB>Fe<SUB>1-y</SUB> KOVAR Alloy through Gaseous Reduction of Mixed Oxides

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