Effect Of Mn Substitution On The Volume And Magnetic Properties Of Er2fe17

The effects of Mn substitution on the magnetic properties of Er2Fe17-xMnx compounds have been investigated by different experimental techniques. An unusual composition dependence of the unit cell volume at room temperature occurs due to a strong magnetovolume effect, which has been confirmed by high temperature linear thermal expansion measurements. From magnetization measurements the composition dependence of the spontaneous magnetization of the 3d-sublattice magnetic moment and of the Curie temperature has been determined. Spin reorientation has been detected for compounds with 3less than or equal toxless than or equal to5.5, as well as remarkable magnetic history effects. (C) 2002 American Institute of Physics.