  Significant new functionality is reported for torsion mechanical tools aimed
at full magnetic characterizations of both spin statics and dynamics in micro-
and nanostructures. Specifically, two orthogonal torque directions are
monitored and the results co-analyzed to separate magnetic moment and magnetic
susceptibility contributions to torque, as is desired for characterization of
anisotropic three-dimensional structures. The approach is demonstrated through
application to shape and microstructural disorder-induced magnetic anisotropies
in lithographically patterned permalloy, and will have utility for the
determination of important magnetic thin-film and multilayer properties
including interface anisotropy and exchange bias. The results reflect
remarkable sensitivity of the out-of-plane magnetic torque to the nature of
small edge domains perpendicular to the applied field direction, and also
contain tantalizing indications of direct coupling to spin dynamics at the
frequency of the mechanics.
