Р71° domain wall energy, which hinders the movement of ic moments or domain walls, resulting in the decrease of the transition efficiency between the ic and mechanical energies. This part work gives an important reference for application under coupled omechanical loadings. РIn addition, the thermal expansion and mechanical properties of <110> oriented crystals Tb0.36Dy0.64(Fe1-xCox)2 were also studied. It is found that the average thermal expansion coefficient over the temperature range from 30 to 100℃ is less than 13 ppm/℃, and decreases with the Co concentration. pressive strength decreases with increasing x, due to the formation of more brittle Laves phase.РKey words: ostriction; ic transition temperature; Oriented crystals; omechanical damping capacity; omechanical coupling coefficient
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