Investigation of
L
1
0
FePt-based soft/hard composite bit-patterned media by micromagnetic simulation
*
Wang Ying
a)†
, Wei Dan
b)
, Cao Jiang-Wei
a)
, Wei Fu-Lin
a)
Switching fields of bits with various values of K
u
for B-type models. For the bits with the same K
u
, the values are averaged.