Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2960344
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A near-field optical head with a beaked metallic plate was used for writing marks on a Co/Pd bit-patterned medium with a diameter of 20-25 nm and a pitch of 30 nm. Magnetic-force-microscope images of the medium show that the magnetizations of single bits were selectively reversed by the head. The light-utilization efficiency (defined as the ratio of the absorbed power in the medium to the incident light power) was estimated from the writing condition used and thermal modeling as about 5%. (C) 2008 American Institute of Physics.
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