Effects of impurities on resistivity of electrodeposited high-B/sub s/ CoNiFe-based soft magnetic thin films

Osaka, Tetsuya; Yokoshima, Tokihiko; Nakanishi, Tetsuya

doi:10.1109/20.950960

Cited by 19 publications

(13 citation statements)

References 12 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our previous work, a film with high B s value was successfully deposited by increasing the FeSO 4 concentration in the plating solution, but this resulted in a high H c value. Moreover, a high concentration of Fe ions leads to the destabilization of the solution [19] prepared, and a method for stabilizing the plating solution was established.…”

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

Self Cite

View full text Add to dashboard Cite

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

Self Cite

View full text Add to dashboard Cite

“…Some additives are employed to increase resistivity by incorporating S, 15,16 C, 17,18 and B. 19 Other additives are used to reduce stress and improve the appearance of the film.…”

Section: Introductionmentioning

confidence: 99%

“…Deposits obtained from electrolytes containing additives are reported to decrease the saturation magnetization and increase the coercivity. [15][16][17][18] The reported saturation magnetization from electrolytes with additives ranged from 1.5 to 1.9 T. The lowest in-plane coercivity in electrodeposited CoNiFe alloys is obtained in additive-free electrolytes, which is associated with a nanocrystalline structure where body-centered-cubic ͑bcc͒ and face-centered-cubic ͑fcc͒ CoNiFe phases coexist with grain sizes between 10 and 20 nm.…”

Section: Introductionmentioning

confidence: 99%

Dependence of magnetic properties on micro- to nanostructure of CoNiFe films

Rhen

Roy

2008

Journal of Applied Physics

View full text Add to dashboard Cite

The magnetic properties of electrodeposited CoNiFe films with thicknesses varying from 0.20 to 10 μm were studied. The films show a single face-centered-cubic CoNiFe phase with grain sizes ranging from 23 to 29 nm. The coercivity is controlled by a combination of the morphology and nanocrystalline structure of the deposits. The nanocrystalline grain size determines the intrinsic coercivity associated with crystalline anisotropy as in the random anisotropy model, whereas an additional morphology term of coercivity is controlled by the thickness inhomogeneity on a submicron scale. The thin films show considerable roughness and a higher coercivity, up to a level of 560 A m−1 (7.0 Oe) in 250 nm films. The thick films show coercivity values of as low as 16 A m−1 (0.2 Oe). The coercivity dependence on thickness was fitted using a simple model combining a morphology dependent additional contribution term to the random anisotropy model as Hc=Hcmorph+Hcanis. Good agreement between the model and the experimental results was obtained.

show abstract

“…Moreover, it has been reported that an increase in the resistivity can be achieved by co-deposition with a metalloidforming element such as sulfur [20,21] or carbon [59,60]. It is suggested that the inclusion of impurities can result in an increase in resistivity [61]. [29].…”

Section: Conife Alloy Filmsmentioning

confidence: 99%

Magnetic Heads

Yokoshima

2009

Nanostructure Science and Technology

View full text Add to dashboard Cite

Figure 6.1 shows how rapidly the areal density of hard disk drives (HDD) has been increasing over the past 20 years [1]. Several critical innovations were necessary to bring about such rapid progress in the field of magnetic recording [2]. One of the most significant innovations from the viewpoint of material improvement was the electrodeposition of permalloy (Ni 80 Fe 20 ), which was introduced by IBM in 1979 as the core material of a thin-film inductive head to increase the magnetic recording density [3]. After the introduction of the magneto-resistive (MR) element as the read head and the electrodeposited permalloy as the write head by IBM in 1991 [4], the rate of increase in the recording density of HDDs jumped from 30% per year to 60% per year. Recently, a giant magneto-resistive (GMR) element has been used for the read element instead of the MR element. The rate of increase in the recording density jumped to over 100% per year in 1999, which is an incredible rate of increase. Since 2002, however, the rate of increase has decreased to 30%; thus, new innovations are required to maintain the rate of increase. In 2004, the practical use of perpendicular magnetic recording instead of longitudinal magnetic recording was announced [5]. This system is a critical innovation for developing high-performance HDD systems with high-recording density. The design of the magnetic recording head was changed because of the change of the recording system.The development of a new magnetic recording head with higher performance and smaller dimensions is a key requirement for realizing high-density magnetic recording. Furthermore, to meet the demand for the rapid increase in magnetic recording density, the soft magnetic film in the core must have low magnetostriction, l s , high electrical resistivity, r, high thermal stability, low film stress, and high corrosion resistance, as well as high saturation magnetic flux density, B s . The recording heads, using higher magnetic materials with high value of B s can write to a high-H c

show abstract

Effects of impurities on resistivity of electrodeposited high-B/sub s/ CoNiFe-based soft magnetic thin films

Cited by 19 publications

References 12 publications

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

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

Dependence of magnetic properties on micro- to nanostructure of CoNiFe films

Magnetic Heads

Contact Info

Product

Resources

About