“…After the first discovery of basic magnetic garnet material YIG (Y 3 Fe 5 O 12 ) in 1957 at Bell labs, considerable research has being conducted over the last couple of decades on both materials advancement and the device designs. In particular, bismuth and cerium substituted YIG material and devices based on these materials, to significantly increase the Faraday rotation and thereby the device length has been widely investigated [8][9][10][11][12][13][14][15][16][17]. As a result, remarkable improvement has been achieved on material advancement from Ce-substituted YIG on GGG with the highest reported Faraday rotation of 4800 0 per cm [11] to achieving single-domain bias magnet-free material [18,19].…”