AC Magnetic Susceptibility of La1−x Ca x MnO 3 (x = 0.25, 0.33, 0.4, 0.5): Monte Carlo Approach
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AC magnetic susceptibility of La1−x Ca x MnO3 (x = 0.25, 0.33, 04, 0.5) thin films was obtained using Monte Carlo simulations combined with Fourier transform. The material stoichiometry was varied depending on the combination of Mn 4+ and Mn 3+ ions. Hamiltonian used includes the Heisenberg interaction, magnetocrystalline anisotropy, and Zeeman effect. For determining AC susceptibility, a time-dependent external magnetic field h(t) was applied. The study was conducted for various angular frequencies and temperatures. The simulations were obtained using a graphical interface that allowed the online monitoring of the results. According to the results, the AC susceptibility decreases not only with the temperature but also with the frequency.
KeywordsManganite Stoichiometry Fourier transform AC susceptibility
The authors gratefully acknowledge the support of the Departamento de Física y Química of La Universidad Nacional de Colombia Sede Manizales.
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