Magnetic force microscopy images of ultrahigh-density bit patterns recorded on high-coercivity longitudinal and perpendicular thin-film media

1996 ◽  
Vol 79 (8) ◽  
pp. 4912 ◽  
Author(s):  
Xing Song ◽  
John Sivertsen ◽  
Jack Judy
Keyword(s):  
Thin Film ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
High Coercivity ◽  
Force Microscopy ◽  
Ultrahigh Density ◽  
Microscopy Images

Magnetic force microscopy images of magnetic garnet with thin‐film magnetic tip

1994 ◽  
Vol 64 (9) ◽  
pp. 1156-1158 ◽  
Author(s):  
A. Wadas ◽  
John Moreland ◽  
Paul Rice ◽  
R. R. Katti
Keyword(s):  
Thin Film ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Force Microscopy ◽  
Magnetic Garnet ◽  
Microscopy Images

Magnetic Domain Observation on Melt-Spun Nd-Fe-B Ribbons Using Magnetic Force Microscopy

1999 ◽  
Vol 577 ◽  
Author(s):  
A. Gavrin ◽  
C. Sellers ◽  
S.H. Liouw
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Measurements ◽  
Magnetic Domain ◽  
Domain Size ◽  
High Coercivity ◽  
Uniform Domain ◽  
Cross Sectional ◽  
Force Microscopy ◽  
Melt Spun

ABSTRACTWe have used Magnetic Force Microscopy (MFM) to study the magnetic domain structures of melt-spun Nd-Fe-B ribbons. The ribbons are commercial products (Magnequench International, Inc. MQP-B and MQP-B+) with a thickness of approximately 20 microns. These materials have identical composition, Nd12.18B5.36Fe76.99Co5.46, but differ in quenching conditions. In order to study the distribution of domain sizes through the ribbon thickness, we have prepared cross-sectional samples in epoxy mounts. In order to avoid artifacts due to tip-sample interactions, we have used high coercivity CoPt coated MFM tips. Our studies show domain sizes typically ranging from 50-200 nm in diameter. This is in agreement with studies of similar materials in which domains were investigated in the plane of the ribbon. We also find that these products differ substantially in mean domain size and in the uniformity of the domain sizes as measured across the ribbon. While the B+ material shows nearly uniform domain sizes throughout the cross section, the B material shows considerably larger domains on one surface, followed by a region in which the domains are smaller than average. This structure is presumably due to the differing quench conditions. The region of coarse domains varies in thickness, disappearing in some areas, and reaching a maximum thickness of 2.75 µm in others. We also describe bulk magnetic measurements, and suggest that.

dc magnetic force microscopy imaging of thin‐film recording head

1994 ◽  
Vol 75 (10) ◽  
pp. 6878-6880 ◽  
Author(s):  
Paul Rice ◽  
John Moreland ◽  
Andrzej Wadas
Keyword(s):  
Thin Film ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Microscopy Imaging ◽  
Recording Head ◽  
Force Microscopy
Sign in / Sign up

Export Citation Format

Share Document