Random Magnetic Anisotropy Studies in SmCo5 Thin Films

Above-room Curie temperature and barrier-layer-dependent tunneling magnetoresistance in 1T-CrO2 monolayer based magnetic tunnel junctions

“…Compared with conventional cubic ferromagnetic materials, such as Fe (K 1 = +4.4Â 10 4 J m À3 ) 52 and Co (K 1 = À7.2 Â 10 4 J m À3 ), 53 K 1 and K 2 of 1T-CrO 2 monolayer are nearly two orders of magnitude larger than those values. Also, K 1 and K 2 of 1T-CrO 2 monolayer are comparable to that of the wellknown rare-earth hard magnet, i.e., hexagonal ferromagnets SmCo 5 (K 1 = +1.9 Â 10 6 J m À3 ), 54 YCo 5 (K 1 = +5.7 Â 10 6 J m À3 ) and Y 2 Co 17 (K 1 = À0.29 Â 10 6 J m À3 ). 55 Therefore, the 1T-CrO 2 monolayer is capable of stabilizing the magnetic state against thermal fluctuation, making it suitable for the ferromagnetic layer of MTJ.…”

“…Also, K 1 and K 2 of 1T-CrO 2 monolayer are comparable to that of the well-known rare-earth hard magnet, i . e ., hexagonal ferromagnets SmCo 5 ( K 1 = +1.9 × 10 6 J m −3 ), 54 YCo 5 ( K 1 = +5.7 × 10 6 J m −3 ) and Y 2 Co 17 ( K 1 = −0.29 × 10 6 J m −3 ). 55 Therefore, the 1T-CrO 2 monolayer is capable of stabilizing the magnetic state against thermal fluctuation, making it suitable for the ferromagnetic layer of MTJ.…”