Griffiths Phase, Re-Entrant Spin-Glass Behaviour and Schottky Anomaly in Anti-Site Disordered Double Perovskite Pr2MnNiO6
Authors/Creators
- 1. Nano Science Laboratory, Institute Instrumentation Centre, Indian Institute of Technology Roorkee, 247667, India
- 2. Graphic Era University, Dehra Dun, Uttarakhand
- 3. Department of Physics, Indian Institute of Technology Roorkee, Roorkee
- 4. Tata Institute of Fundamental Research, Mumbai
- 5. Nano Science Laboratory, Institute Instrumentation Centre, Indian Institute of Technology Roorkee
Description
In the present study, the effect of anti-site disorder is explored on the magnetic properties of Pr2MnNiO6. Due to anti-site disorder, a reduced TC preceded by a Griffith phase has been observed. At low temperatures, we also report the development of the unconventional spin glass phase in co-existence with the cluster-like ferromagnetic order. The signature of the re-entrant spin glass phase is revealed by the frequency-dependent ac-susceptibility measurements. The spin glass behavior is also supported by the slow decay of thermo-remanent magnetization. A broad Schottky anomaly has been observed in the specific heat data near 10 K, along with a linear spin-glass term that was suppressed in the magnetic field of 5T. The analysis of the specific heat data indicates the presence of true singlet state of ground state of Pr3+ in Pr2MnNiO6
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