Magnetic properties of specimens with columnar crystals which are cooled in magnetic field applied parallel to those columnar axis and subsequently aged, amount to 13,500 gauss in residual induction
Br, 775 Oe in coercive force
Hc and 8.5 m.g.o. in maximum energy product (
BH)
max. In case that the specimens are cooled in magnetic field making an angle of θ(0°≤θ≤90°) with columnar axis and subsequently aged,
Br measured parallel to columnar axis tends to fall off less in proportion to 4π
Iscosθ. Also in case of specimens with columnar crystals field-cooled in the direction perpendicular to columnar axis and with equiaxial crystals, observations similar to those mensioned above were carried out and dependence of magnetic properties on angle θ are presented.
In case that specimens with columnar crystals cooled with no magnetic field and subsequently aged,
Br,
Hc and (
BH)
max measured perpendicular to columnar axis of crystals are higher than those measured parallel to columnar axis. In case of specimens with equiaxial crystals cooled in no magnetic field,
Br and (
BH)
max are rather higher, and
Hc is lower than those of specimens with columnar crystals cooled in no magnetic field.
Magnetic domain patterns were also observed in some typical states. Above-mentioned variation of magnetic properties may be made correspondence to these patterns.
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