Temperature- and Field-Tunable Magnetization Reversal in NdCr_0.75Fe_0.25O₃

Department of Physics, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India

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Published online: 5 March 2026

Abstract

Magnetization reversal with two compensation points is observed in polycrystalline NdCr_0.75Fe_0.25O₃. Rietveld refinement of XRD data confirms a phase-pure orthorhombic Pbnm structure. Below the Néel temperature (T_n ~ 225 K), the (Cr/Fe) sublattice adopts a canted G-type antiferromagnetic state, resulting in weak ferromagnetism in the system. The temperature-dependent antiferromagnetic exchange coupling between the Cr³⁺/Fe³⁺ and the Nd³⁺ ions induces Negative Magnetization (NM) in the system, which is gradually suppressed with increasing external field. The magnetization states are very stable and can be switched by both external field and temperature within the compensation temperature window (T_comp1 - T_comp2). An exchange-bias effect with negative H_eb is obtained, originating from the competing interactions between the transition-metal and rare-earth magnetic sublattices. This tunable magnetic behavior makes NdCr_0.75Fe_0.25O₃ a promising candidate for spintronic and magnetic memory applications.