Premium
Monolithic Structure and Multiaxis Magnetic Sensing with Magnonic Crystals
Author(s) -
Takagi Hiroyuki,
Noda Josho,
Ueno Tomomi,
Kanazawa Naoki,
Nakamura Yuichi,
Inoue Mitsuteru
Publication year - 2014
Publication title -
electronics and communications in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.131
H-Index - 13
eISSN - 1942-9541
pISSN - 1942-9533
DOI - 10.1002/ecj.11568
Subject(s) - materials science , magnet , magnetic field , thin film , spin wave , optoelectronics , band gap , sensitivity (control systems) , condensed matter physics , ferromagnetism , electrical engineering , nanotechnology , electronic engineering , physics , engineering , quantum mechanics
SUMMARY We aim at the development of high‐sensitivity magnetic sensors with magnonic crystals at room temperature. We fabricated SmCo thin film magnets on magnonic crystals as a monolithic structure. We were able to excite spin waves and develop a magnonic band gap by means of the magnetic field of the thin film magnet. Since magnonic crystals have a high magnetic field dependence, there is potential for their use as magnetic sensors. The maximum response sensitivity of the magnonic crystals with SmCo thin film magnets was found to be 7900%/Oe. We also investigated two‐axis magnetic field sensing by spin waves.