Characterization of heat-assisted magnetic probe recording on CoNi/Pt multilayers

Zhang, Li; Bain, J.A.; Zhu, Jian‐Gang; Abelmann, Léon; Onoue, T.

doi:10.1016/j.jmmm.2005.11.022

Cited by 32 publications

(26 citation statements)

References 19 publications

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“…The isotropic heat transfer in radial direction results in circular marks in the plane. 9 We model the mark as a cylinder, with radius r and height h ͑or the film thickness͒. The magnetization is along the central axis of the cylinder.…”

Section: Models and Discussionmentioning

confidence: 99%

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Dynamic domain motion of thermal-magnetically formed marks on CoNi∕Pt multilayers

Zhang

Bain

Zhu

et al. 2006

Journal of Applied Physics

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We characterized a method of heat-assisted magnetic recording, which is potentially suitable for probe-based storage systems. The field emission current from a scanning tunneling microscope tip was used as the heating source. Various pulse voltages were applied to two types of CoNi/ Pt multilayered films: one is strongly coupled with low coercivity, and the other is weakly coupled with high coercivity. Experimental results show that marks achieved in strongly coupled medium are larger than that in granular one. An external magnetic field was then applied to those marks. For weak fields ͑lower than the coercivity of the medium͒ the size of marks changes distinctly in the strongly coupled medium but not in the granular one. A model of magnetic domain dynamics is built to quantitatively explain the experimental results. It agrees with experiments. Based on this model, we will be able to figure out the proposals to achieve small marks for ultrahigh recording density.

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Section: Models and Discussionmentioning

confidence: 99%

“…The investigation of the average mark size as a function of the pulse voltage has been published elsewhere. 9 Similar step was done on sample II, and the average mark size is 90-120 nm, with the minimum value of 70 nm.…”

Section: B Writing Marksmentioning

confidence: 99%

Dynamic domain motion of thermal-magnetically formed marks on CoNi∕Pt multilayers

Zhang

Bain

Zhu

et al. 2006

Journal of Applied Physics

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“…The recording medium in those experiments is a CoNi/Pt multilayered film [11] with a Curie temperature of 250 1C. A vibrating sample magnetometer (VSM) is applied to measure the perpendicular anisotropy, K u , the saturation magnetization, M S , and the coercivity, H C , of the film at room temperature.…”

Section: Methodsmentioning

confidence: 99%

“…This has the possibility of very high spatial resolution as scanning tunneling microscopy (STM), which shows atomic resolution in surface observation [6][7][8]. Some previous work has been done on the demonstration of the STM-based HAMR process on a perpendicular medium [9][10][11][12], but the theoretical model of the write current has not been published yet. In this work, I demonstrated the recording process using different STM tips and completed the model of the writing current based on the Fowler-Nordheim theory [13].…”

Section: Introductionmentioning

confidence: 99%

Application of field emission in prolate-spheroidal coordinate in heat-assisted magnetic probe recording

Zhang

2007

Physica B: Condensed Matter

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“…Recently, to overcome the nonlocal character of magnetic field, combination of perpendicular HAMR and probe based recording draws attention as probe based technology ͓i.e., scanning tunneling microscope ͑STM͔͒ which makes certain higher density. 2 . 3 This high uniaxial magnetocrystalline anisotropy could maintain thermal stability and overcome the superparamagnetic limit even at grain sizes below 3 nm, resulting in a tremendous areal density of about 50 Tbit/ in.…”

Section: Introductionmentioning

confidence: 99%

Magnetic and microstructural properties of Cu-doped FePt-Zr/MgO multilayer films

Jung

Kim

Lee

et al. 2010

Journal of Applied Physics

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Structural and magnetic studies of nanocomposite FePt-MgO films for perpendicular magnetic recording applications J. Appl. Phys. 95, 7273 (2004);The magnetic and microstructural properties of Zr-doped FePt/MgO and Cu-doped FePt-Zr/MgO nanocomposite films were investigated. The samples exhibited out-of-plane anisotropy after annealing for only 5 min and their grain growth was restrained by Zr doping. The Cu-doped FePt-Zr/MgO films showed an increased tendency to grow with the ͑001͒ texture on the MgO ͑200͒ layer, because of the increase in the a-lattice parameter of L1 0 Cu-doped FePt ͑002͒, which decreased the lattice mismatch with the MgO ͑200͒ layers. The Curie temperature decreases by about 145 K owing to the effects of Cu doing. Although the addition of Cu reduces the perpendicular magnetic anisotropy and the ability to restrain the grain growth, the addition of both Zr and Cu had a complementary effect on the magnetic and microstructural properties of FePt.

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Characterization of heat-assisted magnetic probe recording on CoNi/Pt multilayers

Cited by 32 publications

References 19 publications

Dynamic domain motion of thermal-magnetically formed marks on CoNi∕Pt multilayers

Dynamic domain motion of thermal-magnetically formed marks on CoNi∕Pt multilayers

Application of field emission in prolate-spheroidal coordinate in heat-assisted magnetic probe recording

Magnetic and microstructural properties of Cu-doped FePt-Zr/MgO multilayer films

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