Magnetic Hardening Induced in RCo5 (R = Y, Gd, Sm) by Short HEBM

The paper is focused on the magnetic and structural properties of RCo5 (R = Y, Gd, Sm) intermetallics fabricated by high energy ball -milling (HEBM).The investigated samples were first produced by arc-melting as bulk materials and then were milled for 1h in dimethylformamide with balls to powder ratio 10:1.The influence of the HEBM parameters on the microstructure was investigated by a variety of complementary measurement methods.The Rietveld refinement was performed to estimate the dependence of crystallite size and microstrain on type of sample.The hysteresis loops were recorded by SQUID magnetometer at 2 K and 300 K and at magnetic field up to µ0H 7 T.The impact of short HEBM process is visible as the enhancement of coercivity and simultaneous reduction of the saturation magnetization.