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<p>Recently, rare earth-based manganites R<sub>1-x</sub>A<sub>x</sub>MnO<sub>3</sub> (A = alkali or alkaline earth) were explored extensively due to their various intriguing feature. However, there are limited reports on medium bandwidth size Nd-Mn–O series. In this work, the low temperature magnetic characteristics of Nd<sub>1-x</sub>Ag<sub>x</sub>MnO<sub>3</sub> (with <i>x</i> = 0, 0.10, 0.15, and 0.20) polycrystalline materials were examined using a magnetometer and electron spin resonance techniques. The undoped NdMnO<sub>3</sub> material shows a transition from paramagnetic to antiferromagnetic behavior near 70&#xa0;K, along with a canted magnetic state occurring at 14&#xa0;K, as indicated by the magnetization versus temperature measurements. In contrast, each NdMnO<sub>3</sub> compound that is doped with Ag exhibits a transition from ferromagnetic to paramagnetic states. The initial magnetization as a function of the magnetic field for the <i>x</i> = 0.20 sample was collected near the ferromagnetic transition temperature (T<sub>C</sub>), specifically within the range of 95–110&#xa0;K, using a temperature increment of 0.5&#xa0;K and analyzed using modified Arrott’s plots, which demonstrated a second-order magnetic phase transition. The electron spin resonance spectra for these materials were recorded at two different temperatures, 78&#xa0;K and 300&#xa0;K, revealing the existence of ferromagnetic phases below T<sub>C</sub>, while a paramagnetic signal was observed at room temperature.</p>

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Low temperature magnetic characteristics of Nd1-xAgxMnO3 compounds

  • 期刊论文

  • 发表日期：

    2025年6月14日

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  • S. K. Srivastava

摘要

Recently, rare earth-based manganites R1-xAxMnO3 (A = alkali or alkaline earth) were explored extensively due to their various intriguing feature. However, there are limited reports on medium bandwidth size Nd-Mn–O series. In this work, the low temperature magnetic characteristics of Nd1-xAgxMnO3 (with x = 0, 0.10, 0.15, and 0.20) polycrystalline materials were examined using a magnetometer and electron spin resonance techniques. The undoped NdMnO3 material shows a transition from paramagnetic to antiferromagnetic behavior near 70 K, along with a canted magnetic state occurring at 14 K, as indicated by the magnetization versus temperature measurements. In contrast, each NdMnO3 compound that is doped with Ag exhibits a transition from ferromagnetic to paramagnetic states. The initial magnetization as a function of the magnetic field for the x = 0.20 sample was collected near the ferromagnetic transition temperature (TC), specifically within the range of 95–110 K, using a temperature increment of 0.5 K and analyzed using modified Arrott’s plots, which demonstrated a second-order magnetic phase transition. The electron spin resonance spectra for these materials were recorded at two different temperatures, 78 K and 300 K, revealing the existence of ferromagnetic phases below TC, while a paramagnetic signal was observed at room temperature.