The ingots of Pr0.15TbxDy0.85-xFe2 （x=0.10-0.85） series compounds with a single phase were prepared -by a arc melting method. The X-ray diffraction patterns were measured using a Philips X’pert MPD X-ray diffractom...The ingots of Pr0.15TbxDy0.85-xFe2 （x=0.10-0.85） series compounds with a single phase were prepared -by a arc melting method. The X-ray diffraction patterns were measured using a Philips X’pert MPD X-ray diffractometer with a non-ambient sample stage at different temperatures, the magnetostrictive distortion in (Pr0.15TbxDy0.85-xFe2) polycrystals was investigated by X-ray diffraction patterns and the magnetostriction coefficient λ111 was calculated. The results show -when the temperature is raised above the spin reorientation temperature region, a splitting appears in the reflection （440）; the λ111 increase with the increasing of Tb content for (Pr0.15TbxDy0.85-xFe2) polycrystals and the full width at half maximum （FWHM） of the reflection （440） increases gradually with the increasing of Tb content. Moreover, as the FWHM of the reflection （440） decreases gradually with the increasing of temperature, the λ111 decreases slightly with the increasing of temperature at the temperature region of 223-373K for Pr0.15Tb0.3Dy0.55Fe2 alloy.展开更多
基金Project(50271023) supported by the National Natural Science Foundation of China
文摘The ingots of Pr0.15TbxDy0.85-xFe2 （x=0.10-0.85） series compounds with a single phase were prepared -by a arc melting method. The X-ray diffraction patterns were measured using a Philips X’pert MPD X-ray diffractometer with a non-ambient sample stage at different temperatures, the magnetostrictive distortion in (Pr0.15TbxDy0.85-xFe2) polycrystals was investigated by X-ray diffraction patterns and the magnetostriction coefficient λ111 was calculated. The results show -when the temperature is raised above the spin reorientation temperature region, a splitting appears in the reflection （440）; the λ111 increase with the increasing of Tb content for (Pr0.15TbxDy0.85-xFe2) polycrystals and the full width at half maximum （FWHM） of the reflection （440） increases gradually with the increasing of Tb content. Moreover, as the FWHM of the reflection （440） decreases gradually with the increasing of temperature, the λ111 decreases slightly with the increasing of temperature at the temperature region of 223-373K for Pr0.15Tb0.3Dy0.55Fe2 alloy.
