Magnetism and critical behavior of double perovskite RE2CoMnO6 (RE = La and Eu) compounds

Extraordinary magnetic properties of double perovskite Eu2CoMnO6 wide band gap semiconductor

“…Moreover, DPs having 'A' site nonmagnetic ions such as La, Y, Lu, Eu [20,[32][33][34][35] has recently drawn extensive attention due to their distinctive magnetic behaviour. As magnetic and other physical properties of DPs are mainly determined by the valence state of the transition-metal cations B and B by means of their exchange interaction with each other and with the rare earth metal ions, the interactions between rare-earth ions (A being nonmagnetic) and transition metal ions can be neglected.…”

Maxwell–Wagner Polarization and Mixed Ferromagnetic and Antiferromagnetic State in Eu2CoMnO6

“…et al investigated the magnetic properties and critical behavior of ECMO via the modified Arrott plots, the Kouvel-Fisher plot, and the critical isotherm analysis. [35] They found that the reliable value of critical parameters (β, δ, and γ) of ECMO is close to the value of the mean-field theoretical model. Further, J. Krishnamurthy et al reported a magnetic-field-induced MMT, magnetocaloric effect, and pyrocurrent in ECMO.…”

“…These systems exhibit multiple exciting magnetic phenomena including meta-magnetic transition (MMT). [32][33][34][35] Among these systems, Eu 2 CoMnO 6 (ECMO) has been less studied, thus there are more possibilities to explore its electrical and magnetic properties. Previously, Youshun Jia DOI: 10.1002/pssb.202300305 Herein, the electrical and magnetic properties of polycrystalline Eu 2 CoMnO 6 are explored.…”

High-Pressure Synthesis of a B-site Co2+/Mn4+ Disordered Quadruple Perovskite LaMn3Co2Mn2O12

“…Benefiting from the structure flexibility, one may get a B-site ordered A 2 BB′O 6 double perovskite by appropriate substitution for the B site in a simple ABO 3 perovskite. The peculiar B–B′ interactions in double perovskites lead to a wide variety of interesting physical properties such as high-temperature ferro/ferrimagnetic half-metallicity, , magnetoelectric multiferroicity, colossal magnetoresistance, , ferroelectric and piezoelectric effects, etc. − Recently, the family of R 2 Co 2+ Mn 4+ O 6 manganite double perovskite has been studied widely because of their interesting magnetism and magnetodielectric properties. − Based on the Goodenough–Kanamori–Anderson (GKA) rules, − the ferromagnetic (FM) interaction is expected to occur between Co 2+ and Mn 4+ ions respectively with 3d 7 (t 2g 5 e g 2 ) and 3d 3 (t 2g 3 ) electronic configurations via the Co–O–Mn superexchange pathways, if the Co–O–Mn bond angle is close to 180°, whereas the antiferromagnetic (AFM) interaction will emerge if the bond angle is close to 90°. As shown in Figure , the magnetic phase diagram of R 2 Co 2+ Mn 4+ O 6 family, when the A-site ionic size gradually decreases to reduce the Co–O–Mn bond angle, the FM Curie temperature ( T C ) almost linearly decreases from 230 K in La 2 CoMnO 6 (LCMO) with ∠Co–O–Mn = 160.1° to 60 K in Tm 2 CoMnO 6 with ∠Co–O–Mn = 144.1°. , Further bending the bond angle to 143.2° for Yb and 142.6° for Lu, the E-type AFM ordering instead of the FM one takes place .…”