Title :
Low-noise magnetic force microscopy with high resolution by tip cooling
Author :
Saito, Hitoshi ; Sunahara, Ryosuke ; Rheem, Youngwoo ; Ishio, Shunji
Author_Institution :
Dept. of Mater. Sci. & Eng., Akita Univ., Japan
Abstract :
Low-noise magnetic force microscopy (MFM) was realized by using a conventional high-vacuum MFM with homemade tip-cooling equipment. The noise level of the MFM at a tip temperature of 130 K was estimated at μN/m order. High spatial resolution of 10 nm was obtained for observing high-density recording media with recording density of 1000 kfci. The improvement of resolution by tip cooling was a result of the reduction of thermodynamic noise of a cantilever and the effective reduction of tip-sample distance due to the magnetic hardening of a tip.
Keywords :
magnetic force microscopy; magnetic noise; magnetic recording; probes; thermal noise; 130 K; cantilever; high density recording media; magnetic force microscopy; noise level; spatial resolution; thermodynamic noise reduction; tip cooling; Cooling; Magnetic force microscopy; Magnetic forces; Magnetic noise; Magnetic recording; Noise level; Noise reduction; Spatial resolution; Temperature; Thermodynamics; High spatial resolution; magnetic force microscopy; thermodynamic noise; tip cooling;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.859891
