2010
DOI: 10.1109/tmag.2010.2043647
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Fabrication, Magnetic, and R/W Properties of Nitrogen-Ion-Implanted Co/Pd and CoCrPt Bit-Patterned Medium

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Cited by 16 publications
(4 citation statements)
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“…Ion irradiation can thereby avoid the lethal side effects of conventional patterning, in particular for a few nm-thick pillar patterns. Various ferromagnetic metallic systems, such as Co/Pt, Co/Pd, CoCrPt/Cr superlattices, FeAl, and CrPt 3 , with ion sources such as He, Ar, Ga, and Xe in the energy range of 10s keV ∼ 10s MeV have been explored with successful results in magnetic nanopatterning. Local destruction of an interfacial structure or a crystal structure in an atomic short-range-order by bombardment with accelerated ions has been a fundamental mechanism to achieve such patterning. However, unavoidable drawbacks of this method are (1) unwanted defect formations due to high energy or heavy ion bombardments; ,,, (2) cross-talk or exchange coupling between patterns through the unpatterned ferromagnetic medium, which results in a loss of control over magnetic switching; and (3) limitations in the use of various material systems such as oxides, nitrides, and sulfides.…”
mentioning
confidence: 99%
“…Ion irradiation can thereby avoid the lethal side effects of conventional patterning, in particular for a few nm-thick pillar patterns. Various ferromagnetic metallic systems, such as Co/Pt, Co/Pd, CoCrPt/Cr superlattices, FeAl, and CrPt 3 , with ion sources such as He, Ar, Ga, and Xe in the energy range of 10s keV ∼ 10s MeV have been explored with successful results in magnetic nanopatterning. Local destruction of an interfacial structure or a crystal structure in an atomic short-range-order by bombardment with accelerated ions has been a fundamental mechanism to achieve such patterning. However, unavoidable drawbacks of this method are (1) unwanted defect formations due to high energy or heavy ion bombardments; ,,, (2) cross-talk or exchange coupling between patterns through the unpatterned ferromagnetic medium, which results in a loss of control over magnetic switching; and (3) limitations in the use of various material systems such as oxides, nitrides, and sulfides.…”
mentioning
confidence: 99%
“…It is therefore crucial to conclusively ensure that bits are exchange decoupled using the simplest possible approaches. However, existing methods for testing the patterned bits either require elaborate full-system tests with read-write routines [7][8][9] or rely on measurements that either provide qualitative analysis [10][11][12][13][14] or work only with exchange-decoupled bits [15,16]. Furthermore, using a single test could in some instances not bring out exchange-coupled behavior, causing a false indication of isolated bits.…”
Section: Introductionmentioning
confidence: 99%
“…A Co/Pd multilayer is a good candidate for graded media because its magnetic anisotropy is tunable by varying parameters such as the Co and Pd layer thicknesses, the number of repeats, the sputtering conditions [6] and the ion irradiation [7][8][9]. In particular, the irradiation of Co/Pd multilayers monotonically reduces the perpendicular magnetic anisotropy.…”
Section: Introductionmentioning
confidence: 99%