Influence of different substrates on potential magnetic degradation duringslider-disk impact

Slider-disk impact causes flash temperature rise on the disk surface, which may lead to magnetic erasure. The substrates with different thermal conduc tivity and Young's modulus show different influences on the flash temperatu re rise and magnetic erasure. The simulation results show that substrates w ith low thermal conductivity and high Young's modulus will cause higher fla sh temperature rise and larger thermal stress. It is suggested to use the s ubstrate or intermediate layer with high thermal conductivity in magnetic m edia in order to reduce the probability of magnetic erasure by slider-disk impact.