Magnetic and crystallographic phase transitions in DypGd1-pVO4

摘要: The compositional vanadate system Dy p Gd 1- VO 4 (0 ≤ 1) displays successive crystallographic and magnetic phase transitions below 14 K. An experimental investigation of these changes has been made with thermal expansion methods Mossbauer spectroscopy. It is found that there a surprising variation the dependence transition temperatures T D ( ) N ), which cannot be adequately explained by conventional pseudo-spin molecular field pair model approximations. A detailed formalism developed accounts for observations in terms magneto-strictively induced quadrupole moment on 3+ ions mixed crsytal and, concomitant interactions between ions. application to corresponding simple diluent Y also discussed.