I was referring to whether the magnetization lies along the normal of the film/tape or if it's in plane. HDDs were able to increase density by moving to materia

I was referring to whether the magnetization lies along the normal of the film/tape or if it's in plane. HDDs were able to increase density by moving to materials that had a magnetization with perpendicular anisotropy but I can't seem to find confirmation if cassette tapes and vhs had in plane anisotropy back then. More so I can't seem to find if today's magnetic tape storage has moved to perpendicular magnetic anisotropy. It seems