On the temperature dependence of disturb properties in plated wire

Theory relating the temperature coefficient of the zero point and digit disturb threshold to the random anisotropy field is discussed. Certain assumptions about the relationship between the random anisotropy of ripple theory and the uniaxial anisotropy field yield relationships that predict the temperature sensitivity of these properties fairly well in Permalloy films. The temperature dependence of most disturb properties appears to be related to the temperature coefficient of the uniaxial anisotropy field from an experimental point of view. Several process variations that can affect the temperature coefficient of the uniaxial anisotropy field are considered.