Magnetic Domains in Single-Pole Magnetic film Heads and Recording Characteristics

Domain structures in the main pole films of single-pole heads were studied, including microscopic domain observations and measurements of domain inclination angles ¿ (between the easy axis direction and the track width direction), and the effects of domain structures on recording using Co-Cr media investigated. Although isolated readback voltages were larger for large angles ¿, other characteristics, noise in particular, were better for smaller ¿. It was concluded that small inclination angles ¿ are necessary for high density, high fidelity recording.