High moment soft FeCoN/NiFe laminated thin films

Jiang, H.; Sin, Kyusik; Chen, Yingjian

doi:10.1109/tmag.2005.855306

Cited by 12 publications

(9 citation statements)

References 9 publications

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“…However, just before switching the external field is given by the coercive field H c in Eq. (12). anisotropy of the strength:…”

Section: Coercive Field Of a Bilayer Structurementioning

confidence: 99%

“…In that approximation the coercive field can be calculated from Eq. (12). If it is assumed that the exchange constant is the same in both layers the coercive field follows from…”

Section: Influence Of J S On the Coercive Field And Energy Barriermentioning

confidence: 99%

“…However, conventional recording systems based on highly coercive grains require a write field that is higher than write field provided by conventional single pole heads. The write field of is limited by the magnetic moment of the pole tip material [12]. The maximum write field achievable with standard head design is about 1.8 T [17].…”

Section: Introductionmentioning

confidence: 99%

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Micromagnetics of exchange spring media: Optimization and limits

Suess

2007

Journal of Magnetism and Magnetic Materials

104

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“…However, just before switching the external field is given by the coercive field H c in Eq. (12). anisotropy of the strength:…”

Section: Coercive Field Of a Bilayer Structurementioning

confidence: 99%

“…In that approximation the coercive field can be calculated from Eq. (12). If it is assumed that the exchange constant is the same in both layers the coercive field follows from…”

Section: Influence Of J S On the Coercive Field And Energy Barriermentioning

confidence: 99%

See 1 more Smart Citation

Micromagnetics of exchange spring media: Optimization and limits

Suess

2007

Journal of Magnetism and Magnetic Materials

104

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“…2 However, high anisotropy causes an unfavorable increase in coercivity, which may exceed the field of current writing heads. 3,4 To solve this problem, exchange-coupled composite (ECC) media and exchange spring composite (ESC) media were proposed by Victora 5 and Suess, 6 respectively. Such media combine both high thermal stability caused by the hard magnetic component and moderate switching fields caused by the soft magnetic component.…”

Section: Introductionmentioning

confidence: 99%

Design and micromagnetic simulation of the L1-FePt/Fe multilayer graded film

Zhang

Liu

Wang

et al. 2012

Journal of Applied Physics

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The magnetic properties of the L1 0-FePt20 nm/Fe5 nm exchange spring bilayer were investigated using the micromagnetic simulation software object oriented micromagnetic framework (OOMMF). The results indicate that coercivity increases and thermal stability improves as the magnetocrystalline anisotropy constant (K FePt) of the L1 0-FePt hard layer increases. When K FePt reaches the critical value of 2.8 Â 10 6 J/m 3 , an additional step appears in the hysteresis loop, and the magnetization process shows a two-phase reversal behavior, which is disadvantageous for practical applications of the recording media. However, setting K FePt as a graded variation removes the step of the hysteresis loop and reduces coercivity while allowing the thermal stability of the system to remain constant. These results can serve as a significant basis for the experimental preparation of exchange-coupled graded media. V

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“…However, such high crystalline anisotropy could cause an unfavorable increase in switching field, which may exceed the limitation of writing heads. 5,6 Currently several approaches, such as bit-patterned media, heat-and microwave-assisted recording, [7][8][9][10][11][12] are under exploration to solve this "trilemma" in magnetic recording. Recently, graded anisotropy materials have received much attention due to their potential applications in bit-patterned media.…”

mentioning

confidence: 99%

Structural and magnetic properties of patterned perpendicular media with linearly graded anisotropy

Zhang

Sun

et al. 2013

Appl. Phys. Lett.

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L1 0-FePt thin films with linearly distributed anisotropy were fabricated by continuously varying substrate temperatures from 650 C to 290 C. An average ordering parameter S ¼ 0.6 was obtained. The hysteresis loop has a clear bow-tie shape with low remanence and coercivity before patterning. The patterned nanopillar arrays exhibit an enhancement in both remanence and coercivity. Dynamic coercivity measurement shows that the nanopillar arrays with linearly graded anisotropy have a relatively small intrinsic coercivity and a relatively high value of the figure of merit. The switching field exhibits a narrow distribution, which indicates a strong coupling between soft and hard phases in nanopillar arrays with graded anisotropy. V

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High moment soft FeCoN/NiFe laminated thin films

Cited by 12 publications

References 9 publications

Micromagnetics of exchange spring media: Optimization and limits

Micromagnetics of exchange spring media: Optimization and limits

Design and micromagnetic simulation of the L1-FePt/Fe multilayer graded film

Structural and magnetic properties of patterned perpendicular media with linearly graded anisotropy

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