According to one embodiment, a magnetic memory is disclosed. The polymer comprises a reaction product obtained by reacting an aminated silane compound represented by the formula R4-n\u2014Si\u2014n with at least one boron compound selected from the group consisting of H3BO3 and B2O3, the amount of the ingredient being 0. By measuring the changes in magnetic properties resulting from the existence of the bio-targets, the amount of the bio-targets in a sample to be tested can be measured. On this basis, advanced telephony services, such as call forwarding, call transferring, and multiparty conferencing are provided.