Chakraborty Tirthankar, Elizabeth Suja
School of Physics and Materials Science, Thapar Institute of Engineering and Technology, Punjab 147001, India.
Department of Physics, Indian Institute of Science, Bangalore 560012, India.
J Phys Condens Matter. 2023 Sep 18;35(50). doi: 10.1088/1361-648X/acf827.
The critical behavior at the ferromagnetic to paramagnetic phase transition of a Griffiths ferromagnet, HoNiMnO, is studied using modified Arrott plot, Kouvel-Fisher, and critical isotherm analysis. Here, we report a second-order phase transition and conclude from the estimated critical exponents that it is unusual and do not belong to conventional universality classes. However, they obey scaling relationships, which indicates the renormalization of interactions around the phase transition temperature. The presence of Griffiths phase in the system accounts for the unusual critical exponents observed.
