Magnetic transducer having a plurality of magnetic layers stacked alternately with a plurality of nonmagnetic layers and a fixed-orientation-of-magnetization layer and thin film magnetic head including the magnetic transducer

A magnetic transducer comprising:

• a stack having a plurality of magnetic layers stacked alternately with a plurality of nonmagnetic layers;
• and
• a fixed-orientation-of-magnetization layer formed on at least one side of the stack in the direction of stacking and having magnetization fixed in a fixed direction, wherein the antiferromagnetic coupling energy induced between two magnetic layers adjacent to each of the plurality of nonmagnetic layers is from 0.1×10−4 J/m2 to 2.0×10−4 J/m2 inclusive.

A magnetic transducer comprising:

• a stack having a plurality of magnetic layers stacked alternately with a plurality of nonmagnetic layers;
• and
• a fixed-orientation-of-magnetization layer formed on at least one side of the stack in the direction of stacking and having magnetization fixed in a fixed direction, wherein the stack is divided into a plurality of regions in the direction of stacking, and at least two regions of the plurality of regions differ from each other in a material or composition of the magnetic layers and in their cross-sectional profiles.