![]() ![]() Solution The ice is melted by the addition of heat: Q m L f 50 g × 335 J/g 16.8 kJ. The temperature is a constant, and we can therefore use Equation 4.8 in the calculation. Hence, the ball-milling time influences also the universality class. Entropy (S) is a measure of the disorder, or randomness, in a system.A higher value of entropy means more disorder, and a lower value of entropy means less disorder. What is the entropy change of the ice Strategy Because the process is slow, we can approximate it as a reversible process. However, for LT-6h, the model changed and the best one became the 3D-Ising model. Both LT-1h and LT-3h systems are belonging to the tricritical mean field model. Noting that raising the ball-milling time weakens the RCP. Consequently, the LT sample could be a permanent magnet in a magnetic refrigerator. The relative cooling power (RCP) value in the LT-1h sample at 2 T is 108% (211.758 J kg−1) compared to that of the Gd at 2 T. Based on the AC-susceptibility, raising the ball-milling time facilitates the appearance of a spin-glass (SG) state. ![]() Additionally, it is accompanied with an increase in coercivity and a decrease in the saturation magnetization and remanence. By increasing the ball-milling duration, the proportion of homogeneity is increased, and the material becomes slightly more resilient, according to the Curie-Weiss law. Thus, increasing the ball-milling time of the sample leads to the elevation of TC and does not enhance the magnitude of the magnetization the fact that it affects the magnetic interactions between atoms. This transition is around 176, 182, and 183 K accompanied by a decrease in the magnitude in both ZFC and FC data. It indicates increased randomness at the interface of solid/liquid, with some structural changes in the adsorbate and adsorbent. Given a discrete random variable, which takes values in the alphabet and is distributed according to : where denotes the sum over the variable's possible values. Positive S shows the adsorbent's affinity toward the adsorbate. v t e In information theory, the entropy of a random variable is the average level of 'information', 'surprise', or 'uncertainty' inherent to the variable's possible outcomes. The Zero-Field-Cooling and Field-Cooling (ZFC/FC) magnetization measurements illustrated that all the systems are presenting a ferromagnetic to paramagnetic phase transition around Curie temperature (TC). The entropy change (S ) during an adsorption is attained using Van't Hoff equation. According to Williamson-Hall method, as the ball-milling duration is increased, the material's crystallite size decreases from approximately 145 to 99 nm for LT-1h and LT-6h, respectively. We have investigated the ball-milling time effect on different physical properties of La0.6X0.1Te0.3MnO3 (X is a lacuna) system (LT) milled for 1 h (LT-1h), 3 h (LT-3h), and 6 h (LT-6h). La0.6X0.1Te0.3MnO3 system with significant refrigerant capacity at low magnetic field and double magnetic entropy change peaks: effect of ball-milling time on physical and critical behaviors Authors: ![]()
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