High-resolution magnetic imaging of domains in TbFe by force microscopy

• DOI: 10.1063/1.99482
• Publication Date: 2002-07-26T13:03:23Z
• Authors: Y. Martin; D. Rugar; H. K. Wickramasinghe
• Keywords: 0103 physical sciences; 01 natural sciences

High-resolution images of domains written in a magnetic thin film have been obtained for the first time using force microscopy. The sample consisted 500-Å-thick Tb19Fe81 with magnetization 109 emu/cm3. Micron-sized were thermomagnetically focused laser beam. Domain by observing interaction small vibrating magnetized iron tip. Typical observed gradients range 0.8×10−4–6×10−4 N/m and forces 10−12–10−11 N. spatial resolution technique was on order 1000 Å. This sufficient to see irregularities those marks which recorded low bias field.