Temperature and field dependences of the magnetization and the magnetic susceptibility in perovskite structures (FMDMn and AceMn)

Yurtseven H., KURT A., KURT M.

Fizika Nizkikh Temperatur, vol.51, no.12, pp.1650-1657, 2025 (Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 51 Issue: 12
  • Publication Date: 2025
  • Journal Name: Fizika Nizkikh Temperatur
  • Journal Indexes: Scopus
  • Page Numbers: pp.1650-1657
  • Keywords: AceMn, ferromagnetic properties, FMDMn, magnetic susceptibility, magnetization
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

Ferromagnetic properties of the perovskite structures, namely, [NH2–CH+–NH2] [Mn(HCOO)3] (FMDMn) and [CH3C(NH2)2] [Mn(HCOO)3] (AceMn), are studied close to magnetic phase transitions. Magnetization M(T) is calculated by the extended mean field model, and M(H) is analyzed for FMDMn near Tc = 8 K. For AceMn, this analysis is performed using M / H(c¢ac) and M(H) near Tc = 9 K. The observed data from the literature are used for the power-law analysis. The critical exponents b, d, and g for M(T), M/H, and M(H), respectively, are determined, which are compared with the expected values from the mean field theory, Ising and Heisenberg models. We find that the Landau mean-field model satisfactorily describes the magnetic behavior of M(T) values for the perovskite FMDMn. Our g and d values are not in agreement with those expected ones. It is indicated that both compounds (FMDMn and AceMn) exhibit weak first-order (or nearly second-order) behavior; in particular, a tricritical magnetic transition is suggested for FMDMn.