2002 年 23 巻 5 号 p. 300-305
We have observed magnetic domains of magnetic nano-structures of nickel by photoemission electron microscopy (PEEM) using synchrotron radiation. The magnetic nano-structures were fabricated by electron beam lithography and lift-off. From the magnetic contrast observed by PEEM and micromagnetic simulations, it is indicated that the square, hexagonal and circular structures form flux closure structures whereas the triangular structure does not form the flux closure structure.