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28 March 2024
 
  » arxiv » 1904.4807

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Physical properties of RIr3 (R = Gd, Tb, Ho) compounds with coexisting polymorphic phases
Binita Mondal ; Shovan Dan ; Sudipta Mondal ; R. N. Bhowmik ; R. Ranganathan ; Chandan Mazumdar ;
Date 9 Apr 2019
AbstractThe binary compounds GdIr3, TbIr3 and HoIr3 are synthesized successfully and found to form in macroscopic co-existence of two polymorphic phases: C15b and AuCu3-type. The dc magnetization and heat capacity studies confirm that C15b phase orders ferromagnetically, whereas the AuCu3 phase remains paramagnetic down to 2 K. The frequency dependent ac-susceptibility data, time dependent magnetic relaxation behavior and magnetic memory effect studies suggest that TbIr3 and HoIr3 are cannonical spin-glass system, but no glassy feature could be found in GdIr3. The critical behavior of all the three compounds has been investigated from the magnetization and heat capacity measurements around the transition temperature (TC). The critical exponents alpha, beta, gamma and delta have been estimated using different techniques such as Arrott-Noaks plot, Kouvel-Fisher plot, critical isotherm as well as analysis of specific heat data and study of magnetocaloric effect. The critical analysis study identifies the type of universal magnetic class in which the three compounds belong.
Source arXiv, 1904.4807
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