X.L.Zhao1) ,T.L.Guo2) ,M.Ohkohchi3) ,T.Okazaki3) ,S.Iijima and Y.Ando3) 1) Japan Science and Technology Corporation ,Department of Physics, Meijo University ,Shiogamaguchi1 501 ,Tempaku ku , Nagoya 468 8502 ,Japan 2) Scientific Research Department,Shenyang University, Wanghuanan Street21 ,Dadong District,Shenyang 110044 ,China 3) Department of Physics, Meijo University, Shiogamaguchi 1 501,Tempaku ku, Nagoya 468 8502,Japan$