Griffiths phase, magnetic memory and ac susceptibility of an antiferromagnetic titanate-based perovskite Er 0.9 Sr 0.1 Ti 0.975 Cr 0.025 O 3 system
Year: 2020
Type: article
Abstract: In this study, we investigated different physical properties of Er 0.9 Sr 0.1 Ti 0.975 Cr 0.025 O 3 titanate prepared by a solid-state reaction that produces a cubic structure with Fd-3m (227) as a space group. Zero-Field Cooled and Field Cooled measurements show a second-order antiferromagnetic transition at Neel temperature T N = 23 K, and the existence of Griffiths phase at around T GP = 132 K. This soft magnetic material depicts a magnetic memory since it ‘remembers’ its thermal history. The relative cooling power of this titanate-based sample was then measured to be around 292.27 J kg −1 at 5 Tesla and 400 J kg −1 at 6 Tesla. However, these values are lower than the RCP value reported for the most magnetic refrigerant Gd, although these results are high enough compared to different perovskite systems. Therefore, Er 0.9 Sr 0.1 Ti 0.975 Cr 0.025 O 3 is a very suitable, environment-friendly magnetic refrigerant.
Source: Physica Scripta
Authors: R Hamdi, M Smari, A Bajorek, L Bessais, E Dhahri, A Samara, S A Mansour, Y Haik
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W3007112853