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Comment: 6 pages, 5 figures, extended version to include analysis of the data from other groups
Comment: 8 pages including 3 figures; related publications can be found at http://www.fhi-berlin.mpg.de/th/th.html
We present the fascinating magnetic properties in homogenous noble-metal-free and rare-earth-free L10-Mn1.5Ga epitaxial films on GaAs (001), including ultrahigh perpendicular coercivity remarkably tunable from 8.1 to 42.8 kOe, giant perpendicular magnetocrystalline anisotropy with a maximum of 22.9 Merg/cc, easily controllable magnetization from 27.3 to 270.5 emu/cc, excellent squareness exceeding 0.94 and large magnetic energy product up to 2.6 MGOe. These magnificent room-temperature magnetic characteristics make our L10-Mn1.5Ga films multifunctional as outstanding and cost-effective alternative for not only perpendicular magnetic recording bits with areal density over 30 Tb inch-2 and thermal stability over 60 years, but variety of novel devices with high magnetic-noise immunity and thermal stability like spin-torque MRAMs and osc...
Comment: 8 pages; to appear in the special issue 'Quantum Phases at Nanoscale' of Solid State Communications
Comment: 35 pages, 11 figures, 2 appendices, to be submitted to Physical Review B
Comment: 3 pages including 5 figures
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