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Electronic and magnetic properties of Nd 5 Co 19 B 6 and Nd 5 Co 21 B

The compounds Nd5Co19B6 and Nd5Co21B4 were manufactured as promising systems suitable for the fabrication of permanent magnets. They belong to the R m+nCo5m+3nB2n family and have the P6/mmm space group. Band structure calculations are performed by the tight binding version of the linear muffin-tin orbital method in the atomic sphere approximation (TB-LMTO ASA). The calculated magnetic moments on Co atoms depend on their local environment. The calculated values are compared with bulk measurements.