Enhanced magnetoresistance properties of K-site deficient LaK□MnO manganites synthesized sol-gel, wet-mixing, and solid-state reaction methods.

The effect of synthesis methods on the structural, magnetic, electrical transport, and magnetoresistance (MR) properties of K-deficient LaK□MnO (LKMO) materials has been investigated. The compounds were synthesized sol-gel (SG), wet-mixing (WM), and solid-state (SS) reaction. The resulting ceramics were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and four point probe (FPP) techniques to evaluate their crystal structure, morphologies, elemental composition, electrical transport properties, and magnetoresistance (MR) behavior.

Investigation of the impact of A-site cation disorder on the structure, magnetic properties, and magnetic entropy change of trisubstituted divalent ions in La(Ba,Ca,Sr)MnO manganite.

This study investigates the effect of A-site disorder, characterized by the average ionic radius (〈〉) and the cation mismatch (), on the structural, magnetic, critical behavior, and magnetic entropy changes in La(Ba,Ca,Sr)MnO manganites with trisubstituted Ba, Ca, and Sr. The sol-gel method was used to prepare polycrystalline samples. All series of compounds crystallize in rhombohedral symmetry with the 3̄ space group.

Magnetoresistance (MR) properties of magnetic materials.

In this review, the classification of magnetic materials exhibiting magnetoresistive properties is the focus of discussion because each material possesses different magnetic and electrical properties that influence the resulting magnetoresistance (MR) values. These properties depend on the structure and mechanism of the material. In this overview, the classification of magnetic materials with different structures is examined in several material groups, including the following: (1) perovskite structure (ABO), (2) alloy, (3) spinel structure, and (4) Kagome magnet.

The magnetocaloric effect properties for potential applications of magnetic refrigerator technology: a review.

In the pursuit of a clean and environmentally friendly future, magnetic refrigerator technology based on the magnetocaloric effect has been proposed as a replacement for conventional refrigeration technologies characterized by inefficient energy use, greenhouse gas emissions, and ozone depletion. This paper presents an in-depth exploration of the current state of research on magnetocaloric effect (MCE) materials by, examining various types of MCE materials and their respective potentials. The focus is particularly directed towards perovskite manganite materials because of their numerous advantages over other materials.