User talk:14.139.38.124

Undo of this change
There is a problem with this change of cos(6phi) to cos^6(phi). Hexagonal crystals have six-fold rotational symmetry, and conventionally this is selected to occur about the z-axis. Therefore, the anisotropy energy should be invariant after a pi/3 rotation in phi (because the system is unchanged). Consider the transformation phi to (phi + pi/3): this is equivalent to rotating a sixth of the way around the z-axis. cos(6phi) goes to cos(6phi + 2pi) = cos(6phi) However cos^6(phi) goes to cos^6(phi + pi/3) \= cos^6(phi). Therefore this violates the rotational symmetry, so I have decided to undo the change. JaBCo2 (talk) 11:42, 25 January 2023 (UTC)