It is known that ferromagnetic material feels force, when
it is in non-uniform magnetic field. Its effect is large,
often larger than that of the direct effect of magnetic field.
We called it as "Hybrid Mechanism". The hybrid mechanism
consists of a set of chain reactions: magnetic field gradient
causes magnetic force or moment which introduces stress in
an FSMA ® stress-induced martensitic transformation ®
the FSMA becomes more softer and exhibits larger deformation.
In reality, the hybrid mechanism (indirect effect) can also
be utilized, when an actuator is designed. That is, by controlling
distribution of magnetic field, force can be applied to an
actuator. Either by stress-induced transformation or variant
change, more deformation of an actuator can be achieved and
can be controlled without introducing solid mechanical supporting
or energy transmitting devices. Currently, Hybrid Mechanism
has the best performance for FSMA actuators.