Write performance of heads with a 2.1-Tesla CoNiFe pole

Ohashi, Keisuke; Morita, Noboru; Tsuda, Teruhisa; Nonaka, Y.

doi:10.1109/20.800883

Cited by 35 publications

(7 citation statements)

References 13 publications

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“…One of the most important aims in the field of information technology known as ''IT'' is increasing data storage density on hard disk drivers. This issue has led to new requirements for the write-head materials, which can not be met by Ni 80 Fe 20 [2][3][4][5][6]. The first requirement is high saturation magnetization (Bs [ [ 1 T), in order to write magnetic signal on the recording media with very high coercivity.…”

Section: Introductionmentioning

confidence: 99%

Studies of electrical resistivity and magnetic properties of nanocrystalline CoFeCu thin films electrodeposited from citrate-added baths

Mehrizi

Sohi

Shafahian

et al. 2011

J Mater Sci: Mater Electron

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In this study, nanocrystalline CoFeCu thin films were electrodeposited at different current densities from baths with natural pH (around 5.2) and containing 20 g/L citrate sodium. The relationship of films structure with soft magnetic properties and electrical resistivity, which are required for new generation magnetic head core, were investigated. SEM, EDS, XRD, TEM, VSM and four probe-point methods were used for characterization of the deposited films. The deposited films exhibited very uniform and homogenous structure with co-axis grains (confirmed by (111) and (110) poles figures and TEM images) throughout the coating. Overall, it was noticed that increasing current density from 1 to 24 mA/cm 2 reduced both grain size (from 63 to 8 nm) and coercivity (from 20 to 1 Oe) of the films. In addition, plotting Log (Hc) versus Log (D 6 ) demonstrated that the coercivity of the films followed ''D 6 law''. Moreover, increasing current density changed phase structures of the films from FCC (Cu)?FCC (Co) to FCC (Co) and then to FCC (Co)

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Section: Introductionmentioning

confidence: 99%

Studies of electrical resistivity and magnetic properties of nanocrystalline CoFeCu thin films electrodeposited from citrate-added baths

Mehrizi

Sohi

Shafahian

et al. 2011

J Mater Sci: Mater Electron

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show abstract

“…Several researchers developed soft magnetic thin films with a high B s value, such as CoFeB [1], CoNiFe [2][3][4][5][6][7] and Fe-based nano-crystalline alloy systems, e.g., FeNAlO [8] or FeCoN [9] by using sputtering. The electrodeposited soft magnetic CoNiFe thin film with a high B s value of 20-21 kG [10,11] shows superior overwrite performance [12,13]. From the aspect of the production process of micro-sized head cores, electroless deposition has advantages compared with the conventional electrodeposition method.…”

Section: Introductionmentioning

confidence: 99%

Preparation of high magnetic flux density CoNiFeB film by electroless deposition for application to magnetic recording devices

Yoshino

Kikuchi

Sugiyama

et al. 2007

Electrochimica Acta

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“…The development of magnetic thin films with high magnetic moments has been greatly needed for many areas including magnetic induction writing heads [1][2][3][4][5], magnetic-MEMS devices [6,7], and other magnetic sensing devices. A higher magnetic moment is especially important for magnetic-MEMS actuators, which create mechanical movement by interaction between magnetic materials and external magnetic field, to obtain relatively large forces [8,9].…”

Section: Introductionmentioning

confidence: 99%