FeTaN/IrMn exchange-coupled multilayer films as soft underlayers for perpendicular media

Jung, Hongsik; Doyle, William

doi:10.1109/20.951152

Cited by 53 publications

(22 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The residual track amplitude was then measured through a bandpass filter with a 100 kHz bandwidth and the entire procedure was repeated using an incremented current starting from the complete dcband erasure of the test track. The half-current I A/2 is the current value required to reduce the track amplitude to 1 2 of its initial as-recorded value and is proportional to the remanent coercivity H cr . The objective of the test was to find the half-current value for each incremented sweep time setting.…”

Section: Resultsmentioning

confidence: 99%

“…Previous work has been primarily focused on eliminating domains in the SUL to obtain low spike noise PMR media. [1][2][3][4] Our study shows that domain wall control is important, but one has to consider other characteristics such as writability of the SUL for perpendicular recording media design. In addition, this is a comparative study of the recording performance of a complete PMR media structure with and without exchange-pinned SUL.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Recording characteristics of perpendicular magnetic media with CoZrNb, NiFeNb, and exchange-pinned NiFeNb soft magnetic underlayers

Zheng

Chekanov

Choe

et al. 2003

Journal of Applied Physics

View full text Add to dashboard Cite

The recording performance of perpendicular media with amorphous CoZrNb, nanocrystalline NiFeNb, and exchange-pinned FeMn/NiFeNb soft magnetic underlayers ͑SULs͒ has been studied. A method has been proposed to quantify the spike noises from the SUL. We found that media with higher permeability NiFeNb SULs showed 4 db higher signal-to-noise ratio than media with lower permeability CoZrNb SULs. The exchange-pinned NiFeNb SUL suppresses spike noise and offers good recording performance. Furthermore, the recording frequency dependence of dynamic coercivity (H c ) was strongly affected by the use of different SULs. The increase in dynamic H c with linear density is negligibly small for media with NiFeNb SULs, whereas dynamic H c sharply increases with increasing density for media with CoZrNb SULs.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recording characteristics of perpendicular magnetic media with CoZrNb, NiFeNb, and exchange-pinned NiFeNb soft magnetic underlayers

Zheng

Chekanov

Choe

et al. 2003

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…First, mass productivity is a rather low when such a thick SUL is sputter-deposited. Second, peculiar layered structures are needed to suppress the "spike noise" caused by magnetic domain boundaries in the SUL [12][13][14].…”

Section: Soft Magnetic Underlayer By Electroless-deposition For Perpementioning

confidence: 99%

Magnetic Thin Films for Perpendicular Magnetic Recording Systems

Sugiyama

Hachisu

Osaka

2009

Nanostructure Science and Technology

View full text Add to dashboard Cite

“…Exchange anisotropy [1], which is a unidirectional anisotropy appearing in ferromagnetic (F) and antiferromagnetic (AF) dual layers, has been applied in various spin devices, for example, conventional MR [2,3], spin valve magnetic heads [4], MRAM [5], and magnetic media [6], as a crucial technology (exchange bias). In spite of its wide application, a fundamental understanding of the phenomenon is still lacking.…”

Section: Introductionmentioning

confidence: 99%

A compensated/uncompensated independent mechanism of exchange anisotropy appearance using a model with loose coupling in the antiferromagnetic region

Sakurai

2011

Elect Comm in Japan

View full text Add to dashboard Cite

SUMMARYSince its discovery, unidirectional anisotropy appearing in exchange coupled ferromagnetic (F)/antiferromagnetic (AF) layers has been used to pin ferromagnetic layers of various spin devices. However, a fundamental understanding is still lacking. The author has already demonstrated a mechanism based on simply assuming a loosely coupled layer in the AF region, without imposing any restrictions on the classical Heisenberg spins, with perfect compensated and uncompensated AF interfaces on the simple cubic (sc) lattice. The difference between compensated and uncompensated is only the F/AF coupling form (spin flop or collinear) interaction, and unidirectional anisotropy does not depend on the compensated or uncompensated case, but appears as a result of introducing loose coupling in the AF region. The unidirectional anisotropy energy does not come from the F/AF interfaces, but from the inner AF coupling defects. As reported in our previous papers, a large decrease in AF interaction from 1/10 to 1/1000 of the usual AF interaction was necessary in order to obtain unidirectional anisotropy in the systems. Correspondence between loose coupling and the defect mode, cell size dependency in the fcc system, and thickness dependency are topics for future investigation.

show abstract

FeTaN/IrMn exchange-coupled multilayer films as soft underlayers for perpendicular media

Cited by 53 publications

References 11 publications

Recording characteristics of perpendicular magnetic media with CoZrNb, NiFeNb, and exchange-pinned NiFeNb soft magnetic underlayers

Recording characteristics of perpendicular magnetic media with CoZrNb, NiFeNb, and exchange-pinned NiFeNb soft magnetic underlayers

Magnetic Thin Films for Perpendicular Magnetic Recording Systems

A compensated/uncompensated independent mechanism of exchange anisotropy appearance using a model with loose coupling in the antiferromagnetic region

Contact Info

Product

Resources

About