Observation of magnetization reversal and magnetocaloric effect in manganese modified EuCrO3 orthochromites

Structural, 57Fe Mössbauer and XPS studies of mechanosynthesized nanocrystalline Nd0.33Eu0.67Fe1-Cr O3 particles

“…The physical and chemical properties of the perovskite-related europium ferrite EuFeO3 and europium chromite EuCrO3 are attractive from an applied viewpoint [1][2][3][4]. For instance the multiferroicity, low temperature canted antiferromagnetism, high dielectric constants, low dielectric losses and the high temperature stability render them potential in applications that include magnetic storage devices, spin switches, multifunctional smart devices, magneto-electric coupling devices, gas sensing devices and solid oxide fuel cells among others [1][2][3][4][5][6][7][8][9][10][11]. Both solids crystallize in a distorted orthorhombic crystalline structure (SG: Pbnm; #62) where the rare earth (RE) Eu 3+ cation and the transition metal (TM) cations, respectively, occupy the cuboctahedral (A) and the corner-sharing octahedral (B) sites [1][2][3][4][5].…”

“…For instance the multiferroicity, low temperature canted antiferromagnetism, high dielectric constants, low dielectric losses and the high temperature stability render them potential in applications that include magnetic storage devices, spin switches, multifunctional smart devices, magneto-electric coupling devices, gas sensing devices and solid oxide fuel cells among others [1][2][3][4][5][6][7][8][9][10][11]. Both solids crystallize in a distorted orthorhombic crystalline structure (SG: Pbnm; #62) where the rare earth (RE) Eu 3+ cation and the transition metal (TM) cations, respectively, occupy the cuboctahedral (A) and the corner-sharing octahedral (B) sites [1][2][3][4][5]. The Néel temperatures (TN) of these G-type antiferromagnets are  662 K (EuFeO3) and  181K (EuCrO3) [6].…”

“…Conventionally, pure and cation-doped bulk and microcrystalline EuFeO3 and EuCrO3 are prepared with the solid-state reaction (ceramic) route wherein the reactants, either oxides and/or carbonates, are pre-heated during two or more prolonged heating sessions (12-24 h) at elevated temperatures (1000-1380 C) [1][2][3][4]. The materials have also been prepared using the self-propagating high-temperature synthesis routes where temperatures in the range of ~1400 to ~ 2200 C were used [5,6].…”

Enhanced magnetocaloric effect and magnetic phase diagrams of single-crystalGdCrO3

“…During the refinements, we fixed m = 114.17 (51) from instrument, sample holder, as well as the glue, the temperature-independent diamagnetism components of Gd 3+ and Cr 3+ ions, the temperature-independent net magnetization of Cr 3+ magnetic sublattice, and m is a constant. Similar modeling strategies were used previously [6,7,12,27,28]. The values of the diamagnetism of Gd 3+ and Cr 3+ ions are ∼-2.0 × 10 −5 and ∼-1.1 × 10 −5 emu/mol [29], respectively, which could be neglected rea-sonably.…”

Observation of magnetization reversal behavior in Sm0.9Gd0.1Cr0.85Mn0.15O3 orthochromites

“…In recent years, rare-earth orthochromites (RCrO 3 ) have been extensively explored because they exhibit temperature induced magnetization reversal (TIMR) phenomenon. [1][2][3][4][5] This is useful in thermomagnetic switches and thermally assisted random access memories. 6,7 TIMR is defined as a temperature induced crossover of magnetization from a positive to negative value.…”