Temperature and concentration dependences of $Gd_{1-x}Zr_xCo_2$ exchange and zone magnetostriction

The results of an investigation into the magnetostriction properties of $Gd_{1-x}Zr_xCo_2$ intermetallic compounds as a function of zirconium concentration have been presented for magnetic fields strength of 13 kOe and in the temperature range from 77 to 360 K. Volume magnetostriction is shown to comprise the exchange and zone contributions. The temperature and concentration dependences of these contributions have been found. It has been shown that the obtained dependences of magnetostriction can be justified by significant changes in the d-zone structure.