Magnetic Thin Films for Perpendicular Magnetic Recording Systems

Sugiyama, Atsushi; Hachisu, Takuma; Osaka, Tetsuya

doi:10.1007/978-1-4419-1424-8_7

Cited by 1 publication

(3 citation statements)

References 44 publications

(48 reference statements)

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“…Increase in the areal density of HDDs has been achieved via developments in miniaturizing the read-write head, reducing the head-medium spacing, and decreasing the size of the constituting grains of the magnetic thin film structures . Soft magnetic thin films with low coercivity ( H c ), high saturation magnetic flux density ( B s ), and high electrical resistivity (ρ) are used as the core material of high-density recording heads. , Many soft magnetic films of such transition metals as Fe, Co, and Ni and their alloys have been proposed as suitable candidates for integration into magnetic data storage technology. − NiFe alloys with low H c and relatively high B s were used for the first time as the core material in inductive heads by IBM . However, the interest in cobalt-containing alloys, such as CoNiFe, has recently grown, because of their promising characteristics, such as higher saturation flux density values. ,,, …”

Section: Introductionmentioning

confidence: 99%

“…With the tremendous rapid technological progress that our society has witnessed over the past few decades, magnetic recording media (i.e., hard disk drives (HDDs)) have gained considerable attention, because of their advantages in capacity, speed, and fabrication cost. 1 Increase in the areal density of HDDs has been achieved via developments in miniaturizing the read-write head, reducing the head-medium spacing, and decreasing the size of the constituting grains of the magnetic thin film structures. 2 Soft magnetic thin films with low coercivity (H c ), high saturation magnetic flux density (B s ), and high electrical resistivity (ρ) are used as the core material of high-density recording heads.…”

Section: Introductionmentioning

confidence: 99%

“…2 Soft magnetic thin films with low coercivity (H c ), high saturation magnetic flux density (B s ), and high electrical resistivity (ρ) are used as the core material of high-density recording heads. 1,3 Many soft magnetic films of such transition metals as Fe, Co, and Ni and their alloys have been proposed as suitable candidates for integration into magnetic data storage technology. 3−6 NiFe alloys with low H c and relatively high B s were used for the first time as the core material in inductive heads by IBM.…”

Section: Introductionmentioning

confidence: 99%

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Tuning the Crystal Structure and Magnetic Properties of CoNiFeB Thin Films

et al. 2013

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CoNiFeB thin films with a high saturation magnetic flux density (B s ) and a low coercivity (H c ) are used as core materials in high-density recording heads. Electroless deposition has proven to be an excellent process for the fabrication of metallic thin film structures, because it does not suffer from limitations associated with current density distribution and can therefore be used to create uniform coatings on substrates with fine and/or complex geometries. The crystal structure of CoNiFeB films, which is dependent on their chemical composition, can be controlled by changing the bath composition; however, to our knowledge, there is no report on tuning the chemical composition, crystal structure, and magnetic properties of CoNiFeB thin films only by the optimization of the electroless deposition parameters while maintaining the same concentration of salts in the bath. In this study, through the use of complementary techniques including AFM, SEM, XRD, EDS, and VSM, we show how the crystal structure of the CoNiFeB films can be tuned from a single-body-centered cubic (BCC) phase to a single facecentered cubic (FCC) phase with intermediate mixtures of BCC/FCC phases by only changing the pH and temperature of the electroless bath.

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