Table 3. The saturation magnetization (M
s
), coercivity (H
c
), and remanence (M
r
) of the treated sengon wood
Treatment
M
s
(emu/g)
M
r
(emu/g)
H
c
(O
e
)
7.5% Fe
3
O
4
-FA
0.685
0.192
2.28 × 10
–7
10% Fe
3
O
4
-FA
1.710
0.409
1.87 × 10
–6
12.5% Fe
3
O
4
-FA
1.248
0.310
1.08 × 10
–7
FA: furfuryl alcohol.