Magnetic force microscopy: General principles and application to longitudinal recording media

1990 ◽  
Vol 68 (3) ◽  
pp. 1169-1183 ◽  
Author(s):  
D. Rugar ◽  
H. J. Mamin ◽  
P. Guethner ◽  
S. E. Lambert ◽  
J. E. Stern ◽  
...  
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Recording Media ◽  
Force Microscopy ◽  
Longitudinal Recording

Study of the thermal aftereffect on longitudinal recording media by magnetic force microscopy

1999 ◽  
Vol 85 (8) ◽  
pp. 5157-5159
Author(s):  
Satoshi Matsunuma ◽  
Ichiro Tamai ◽  
Tetsuya Kanbe ◽  
Kiwamu Tanahashi ◽  
Akira Ishikawa ◽  
...  
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Recording Media ◽  
Force Microscopy ◽  
Longitudinal Recording

Magnetic force microscopy of recording media (abstract)

1990 ◽  
Vol 67 (9) ◽  
pp. 5953-5953 ◽  
Author(s):  
H. J. Mamin ◽  
D. Rugar ◽  
S. E. Lambert ◽  
L. P. Franco ◽  
I. L. Sanders ◽  
...  
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Recording Media ◽  
Force Microscopy

Fabrication of Tips for Magnetic Force Microscopy Employing Magnetic Multilayer Structures

2014 ◽  
Vol 605 ◽  
pp. 465-469
Author(s):  
Ryo Suzuki ◽  
Shinji Ishihara ◽  
Mitsuru Ohtake ◽  
Masaaki Futamoto
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Multilayer Film ◽  
Permanent Magnets ◽  
Magnetic Domain ◽  
Recording Media ◽  
Magnetic Multilayer ◽  
Magnetic Recording Media ◽  
Switching Field ◽  
Force Microscopy

Magnetic force microscope (MFM) tips are prepared by coating Si tips of 4 nm radius with [Co (1 nm)/M(1 nm)]20 (M = Pt, Pd, Ni) multilayer films. An MFM tip prepared by coating 40-nm-thick Co film is employed as a reference tip. The influences of M layer material on the spatial resolution and the switching field of MFM tip are investigated. The spatial resolutions of Co/M multilayer coated tips are estimated to be within 9.4 ± 0.3 nm for all the M materials, which is about 6% inferior to that of Co coated tip (8.8 nm). Higher switching fields of 1425 and 825 Oe are respectively observed for the tips coated with Co/Pt and Co/Pd multilayers, whereas the field of tip coated with Co/Ni multilayer is 275 Oe which is similar to that of Co coated tip (325 Oe). The switching field is influenced by the magnetic anisotropy of multilayer film. An MFM tip coated with Co/Pt multilayer film is useful to observe the magnetic domain structure of permanent magnets and magnetic recording media.

Magnetic Force Microscopy Analysis of Thermal Stability in Longitudinal Media

1998 ◽  
Vol 517 ◽  
Author(s):  
E. N. Abarra ◽  
I. Okamoto ◽  
T. Suzuki
Keyword(s):  
Thermal Stability ◽  
Time Dependence ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Force Microscopy ◽  
Stability Performance ◽  
Signal Decay ◽  
Longitudinal Recording ◽  
Microscopy Analysis ◽  
Thermal Stability Of

AbstractThe thermal stability of written bits in high density longitudinal recording media is investigated using magnetic force microscopy (MFM). The time dependence of the MFM signal is examined for different linear densities on CoCrPt-based media of various thickness. At ambient temperature, lesser decay is observed using the MFM compared to spin stand measurements on the same CoCrPtTaNb media on Al which emphasizes the dependence of bit stability with writing conditions. Moderate anneals at 373 K reveal a rapid initial ∼ 10% signal decay followed by stable behavior not observed in the magnetization time dependence measurements. 200 kfci tracks on a 20-nim thick CoCrPtTa medium on Si with a coercivity of 3 kOe displayed stable (∼ 2%) behavior against a 105-hour anneal at 373 K in air. These results are correlated with media properties to obtain parameters that are good indicators of thermal stability performance.

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