Magnetic anisotropy is that property due to which ferromagnets tend to magnetize along certain crystallographic axes, called directions of easy magnetization.
Example: In certain single crystals such as iron.
The magnetic properties depend upon the direction in which these are measured.
In case of iron, there are six preferred directions of spontaneous magnetisation.
In case of iron
Reference: This article is referred from my book “electrical engineering materials” having ISBN 978-81-272-5069-0