Table 1.

Intrinsic magnetic properties for various magnetic materials.

Materials	A (erg/cm)	K (erg/cm3)	Ms (emu/cm3)	Δ (nm)
α-Fe	2.50 × 10−6	4.60 × 105	1.71 × 103	73.20
Fe65Co35	1.67 × 10−6	1.00 × 102	1.93 × 103	4.06 × 103
Nd2Fe14B	7.70 × 10−7	4.30 × 107	1.28 × 103	4.20
FePt	1.25 × 10−6	2.50 × 107	5.00 × 102	7.02
SmCo5	1.20 × 10−6	5.00 × 107	5.50 × 102	4.87

A, K, Ms and Δ denote the exchange constant, the volume anisotropy constant, the spontaneous magnetization and the Bloch wall width respectively.