Magnetothermal Effects and Critical Behavior of Rare Earth Manganese Oxides La 0.65 Ca 0.35 Mn 1-x Ni x O 3 (x=0, 0.2)

Abstract

This study used the conventional solid-phase reaction method to prepare polycrystalline samples: La0.65Ca0.35Mn1−xNixO3 (x = 0, x = 0.2). The effects of Ni doping on the preformed cluster phases, magnetothermal effects, and critical behavior were systematically investigated. The results showed that the prepared polycrystalline samples all had cubic chalcogenide structures. The substitution of Ni2+ ions for a certain number of Mn3+ ions reduced the changes in the lattice parameters, unit cell volume, Curie temperature (Tc), magnetic entropy, and magneto-entropy. The changes in these properties originated from the partial substitution of Ni2+ for Mn3+ ions, which changed the Mn3+/Mn4+ ratio and decreased the Mn-O-Mn bond angle, thus weakening the double exchange interaction. Both samples had a preformed cluster phase above the low-temperature magnetic-transition temperature. The critical behaviors of both samples fit the tricritical model well. A transition from primary to secondary phase transition existed for both the parent and doped samples, and the maximum magnetic entropy changes of the samples at an applied magnetic field of 7 T were 7.70 J·kg− 1·K− 1 and 2.08 J·kg− 1·K− 1, respectively.

Socialization causes long-lasting behavioral changes

“…Indeed, one might hypothesize that rescuing such starvation-like phenotype would reveal differences between both experimental conditions. Notably, socialization-induced behavioral changes are sexually dimorphic, since grouped and single-reared females behave similarly 46 . In fact, male-specific P1 interneurons act as an internal state regulatory hub for sleep, aggression, sleep and spontaneous locomotion 47 .…”

“…In fact, male-specific P1 interneurons act as an internal state regulatory hub for sleep, aggression, sleep and spontaneous locomotion 47 . Together with Diuretic hormone 44-(DH44) and Tachykinin-(TK) expressing interneurons, P1 neurons form a male-specific neural circuit that regulates spontaneous locomotion in response to social interaction, thus suggesting a possible common mechanism for socially-induced behavioral changes 46 .…”

The Effect of Digital Capability, Digital Orientation on Business Resilience with Digital Transformation as a Mediating Variable

“…In the scope of digital products, digital capability can be interpreted as the ability, talent, and specialization possessed by companies in controlling digital technology to create new products. Levallet (Sun, 2022;Paskova, 2021;Gao et al, 2022). This study focuses on the influence of digital capabilities and orientation on small business resilience using Indonesian small businesses as a case in point.…”