A method and device for generating pharmaceutical agent particles using focused acoustic energy are provided. It is thus possible to obtain a magneto-resistive effect device of improved reliability that enables a structure capable of having a narrowed read gap to be adopted to meet the recently demanded ultra-high recording density, allows a stable bias magnetic field to be applied in simple structure, and obtain a stable magneto-resistive effect change. The seal can be rubber or any flexible, pliable material capable of creating a seal with a surface. An execution profiling section is provided for continuously or intermittently providing execution data used for updating the means for memory allocation.