Combined effects of stress and temperature on magnetic domains and scratch morphology of the ferromagnetic film of a perpendicular magnetic recording media are investigated using nanoscratch, atomic force microscope, and magnetic force microscope. The stored magnetic signals in the non-scratched area become weak with increasing temperature due to the thermal agitation of magnetic spins. The high local stress permanently damages the magnetic signals at the scratch center. However, the weakened magnetic signals at lightly stressed regimes recover significantly with increasing temperature up to 300 °C due to the partial recovery of ferromagnetism. Regarding the nanoscratch morphology, when the temperature increases up to 300 °C, the scratch is healed noticeably due to metal oxides (CoO, Cr₂O₃, and PtO₂) built-up on the scratched surface. Surprisingly, the scratch deepens at 400 - 600 °C. This is attributed to PtO₂ evaporation and the phase transition of magnetic grains from HCP to FCC.

使用纳米划痕，原子力显微镜和磁力显微镜研究了应力和温度对垂直磁记录介质的铁磁膜的磁畴和划痕形态的综合影响。由于磁自旋的热搅动，随着温度的升高，未刮擦区域中存储的磁信号变弱。较高的局部应力会永久损坏刮擦中心的磁信号。但是，由于铁磁性的部分恢复，在轻度应力下减弱的磁信号会随着温度升高至300°C而显着恢复。关于纳米划痕形态，当温度升高到300°C时，由于金属氧化物（CoO，Cr ₂ O ₃和PtO ₂）积聚在刮擦的表面上。令人惊讶的是，刮痕在400-600°C时加深。这归因于PtO ₂蒸发和磁性颗粒从HCP到FCC的相变。