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. 2024 Aug 15;9(34):36540-36545.
doi: 10.1021/acsomega.4c04607. eCollection 2024 Aug 27.

Contrasting Magnetic Characteristics of Disordered Nd0.5Ba0.5Mn0.5Fe0.5O3-δ/2 and 112-Type Ordered NdBaMnFeO6-δ Perovskites

Aslam Hossain  1 , Artem R Gilev  2 , Premakumar Yanda  3 , Vladimir A Cherepanov  2 , Kathiresan Sakthipandi  4 , A Sundaresan  3 , E A Mukhanova  1 , Alexander V Soldatov  1 , A K M Atique Ullah  5
Affiliations

Contrasting Magnetic Characteristics of Disordered Nd0.5Ba0.5Mn0.5Fe0.5O3-δ/2 and 112-Type Ordered NdBaMnFeO6-δ Perovskites

Aslam Hossain et al. ACS Omega. .

Abstract

The magnetic properties of disordered Nd0.5Ba0.5Mn0.5Fe0.5O3-δ/2 and ordered NdBaMnFeO6-δ perovskites were investigated through temperature- and field-dependent DC-magnetization measurements. The temperature dependence of magnetic susceptibilities revealed that antiferromagnetic ordering occurs at temperatures below 185 K for the disordered Nd0.5Ba0.5Mn0.5Fe0.5O3-δ/2 sample, whereas the ordered NdBaMnFeO6-δ perovskite exhibited a paramagnetic state throughout the entire temperature range examined. Notably, the disordered sample exhibited a glassy state, even at room temperature, which transformed into an antiferromagnetic state under higher applied magnetic fields. The magnetic ordering in the disordered Nd0.5Ba0.5Mn0.5Fe0.5O3-δ/2 perovskite and the magnetic-disordering state in the structurally ordered NdBaMnFeO6-δ perovskite could be attributed to the alteration of the oxidation state of Mn.

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Conflict of interest statement

The authors declare no competing financial interest.

Figures

Figure 1
Figure 1
(Left) Crystal structure of disordered Nd0.5Ba0.5Mn0.5Fe0.5O3-δ/2; (right) ordered NdBaMnFeO6−δ perovskite.
Figure 2
Figure 2
XRD patterns for (a) Nd0.5Ba0.5Mn0.5Fe0.5O3−δ and (b) NdBaMnFeO5.09 refined by the Rietveld method. Inset shows their corresponding crystal structure.
Figure 3
Figure 3
Temperature-dependent magnetization of disordered Nd0.5Ba0.5Mn0.5Fe0.5O3-δ/2 perovskite (a) M(T), (b) χ–1 (T), and (c) dM/dT (T) and ordered NdBaMnFeO6-δ perovskite (d) M(T), (e) χ–1 (T), and (f) dM/dT (T).
Figure 4
Figure 4
M–H curves for (a) Nd0.5Ba0.5Mn0.5Fe0.5O3−δ/2 and (b) NdBaMnFeO6−δ at (c) 3 and (d) 300 K.
Figure 5
Figure 5
Schematic illustration showing (a, b) superexchange interactions favoring antiferromagnetic coupling and (c) double exchange interaction favoring ferromagnetic coupling between Fe and Mn ions, which is mediated via O ion lying between Fe and Mn.
See this image and copyright information in PMC

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