Structural, magnetic and magnetocaloric properties of Zn0.6−xNixCu0.4Fe2O4 ferrite nanoparticles prepared by Pechini sol-gel method

Fe doping effects on the structural, magnetic, and magnetocaloric properties of nano-sized Pr0.6Bi0.4Mn1−x Fe x O3 (0.1 ≤ x ≤ 0.3) manganites

“…Owing to their substantial MCE, the perovskite manganites with the general formula Ln 1-x A x MnO 3 , where Ln is a rare earth ion (Ln = La, Pr, Sm …) and A is a divalent element (A = Ca, Sr, Ba …), have attracted great interest for their colossal magnetoresistance (CMR) and MCE [3][4][5][6]. In fact, magnetic refrigeration is becoming a promising technology to replace the conventional gas compression-expansion technique.…”

Microstructural analysis, magnetic properties, magnetocaloric effect, and critical behaviors of Ni0.6Cd0.2Cu0.2Fe2O4 ferrites prepared using the sol–gel method under different sintering temperatures

“…Furthermore, the ÀDS max M and RCP values were comparable to those found at the same applied magnetic eld in some other ferrite systems that are considered potential candidates for magnetic refrigeration. 9,11,14 3.4. Critical behavior 3.4.1.…”

“…In recent years, large MCEs have been found in other materials, such as perovskite manganites ABO 3 (ref. [4][5][6][7][8] and spinel ferrites AFe 2 O 4 , [9][10][11][12][13][14] which have attracted increasing attention in MR research. The main advantages of these materials over Gd and GdSiGe alloys 15 are low coercive forces, nonactive chemical properties (no oxidation), low costs, and high electric resistance (minimum Eddy current loss).…”

Study of magnetic properties of NiZnCu ferrite synthesized by Pechini method and solid-state reactions

“…[10][11][12] Magnetic properties of ferrite synthesized by different types of sol-gel method were investigated and compared to ferrite produced by conventional ceramic methods. [13][14][15][16][17][18][19] It results that ferrites which exhibit approximately the same permeability and coercive field are achieved by both sol-gel and solid-state methods. However, the magnetic performances at high frequency are not presented in these papers so it is difficult to know if this process is well-adapted to the production of low-loss ferrite.…”