Critical phenomena in Pr0.6Sr0.4MnO3 perovskite manganese oxide

Abstract We studied the critical phenomena of perovskite-manganite compound Pr 0.6 Sr 0.4 MnO 3 around its Curie temperature. Experimental results based on magnetic measurements using Banerjee criterion revealed that the sample exhibits the second-order paramagnetic–ferromagnetic transition. It is found that the critical behaviour analysis and Kouvel–Fisher method show that the 3D- Heisenberg model is the best one to describe the critical phenomena around the critical point. Critical exponents β  = 0.3785(6) and γ  = 1.304(12) at T C  = 320 K are obtained. The critical exponent δ  = 4.7183(2) is determined separately from the isothermal magnetization at T C . These critical exponents fulfil the Widom scaling relation δ  = 1 +  γ / β . Based on the critical exponents, the magnetization–field–temperature ( M – H – T ) data around T C collapses into two curves obeying the single scaling equation M ( H , e ) = | e | β f ± ( H / | e | β + γ ) with e  = ( T  −  T C )/ T C is the reduced temperature.