Effect of calcium deficiency on the critical behavior near the paramagnetic to ferromagnetic phase transition temperature in La0.8Ca0.2MnO3 oxides

Near room temperature magnetocaloric properties of Fe substituted La0.67Sr0.33MnO3

“…The value of n predicted from the linear fit of the above plot are 0.86 and 0.75 respectively for x = 0.05 and x = 0.1. In recent years, numerous reports are available relating to the field dependence of MCE with the critical exponents of the ferromagnetic-paramagnetic transition of the materials [11][12][13][14][15][16]30,31]. To understand the exact nature of magnetic phase transition in the present case, the critical exponent analysis was done near T C .…”

“…Since Fe 3+ ions have a radius identical to that of Mn 3+ ions, the doping of Fe in LSMO is of particular interest because it does not change the structure [10]. Several reports are available regarding the critical exponent analysis of both bulk and nano manganites around the paramagnetic-ferromagnetic phase transition through various techniques such as modified Arrott plot method, Kouvel-Fisher method [11][12][13][14][15][16]. In the case of conventional methods, an appreciable uncertainty is unavoidable because the starting values of the critical exponents chosen at the beginning of the work may not be accurate.…”

The Structural and Magnetic Properties of CuRh1−x Mn x O2 (0 ≤ x ≤ 0.1) Delafossite Oxide

“…According to refs. [33][34][35][36], the Mn 3+ subsisting can destabilize the anti-ferromagnetic order of Rh 3+ ions, modulate the spin configuration, and bring about ferromagnetism. Although the super-exchange interaction between Mn 3+ is also antiferromagnetic [37], the coexistence of Mn 3+ and Rh 3+ should induce a new magnetic exchange mechanism.…”

Structural, magnetic and magnetocaloric properties of 0.75La0.6Ca0.4MnO3/0.25La0.6Sr0.4MnO3 nanocomposite manganite

“…These materials are given a particular attention from scientic community not only for its dynamic ability for uses in device applications [13][14][15] but also for its impressive physical properties. [16][17][18][19][20] Nowadays, researches are focusing on how to enhance the MCE values of perovskite manganites and create new material system with signicant magnetocaloric properties in a wide temperature range around room temperature. [21][22][23][24][25][26] Manganites may be promising candidates to satisfy this requirement because the transition temperature can be easily tuned by element substitution, 27 calcination temperature, 28 particle size, 29 and pressure.…”