Abstract
Extending our earlier investigation of magnetic properties of Nd2NiMnO6, we show that it exhibits a magnetic transition below ∼6 K to a ferrimagnetic state. This behavior is interpreted as arising from a long-range ordering of Nd moments antiferromagnetically coupled to the ferromagnetic Ni–Mn ordered moments. Due to the richness of its multiple magnetic transitions and the easily influenced magnetic state by the application of an external magnetic field, established in our earlier study, it has a remarkable inverse magneto-caloric effect (IMCE) at low temperatures (T < 50 K) together with a significant conventional magneto-caloric effect (CMCE) at the ferromagnetic ordering temperature (Tc ∼ 200 K). IMCE and CMCE correspond to the antiferromagnetic arrangement of Nd and Ni–Mn sublattices and ferromagnetic ordering of Ni–Mn sublattices, respectively. Nd2NiMnO6 with its second order phase transition follows the universal behavior of ∆SM(T); it also shows a power law dependency on the magnetic field as
Highlights
Double perovskites with the general formula, A2BB′O6 where, A = rare earth, B and B′ = transition metals, with an ordered arrangement of BO6 and B′O6 are very interesting class of materials because of their large variety of physical properties, such as magnetism, ferroelectricity, magnetoresistance, magneto coupling [1] and magnetocaloric effect (MCE) [2]
One can find several studies of magnetic properties of Nd2NiMnO6 [5, 6]. It undergoes a ferromagnetic ordering of the Ni–Mn sublattice at around 200 K
While there were conflicting results and interpretations of low temperature magnetic properties, recently it was shown [5] that the diversity in the reported results at an intermediate temperature of about ∼150 K arises from different extents of Ni/Mn anti-site ordering, much as in the case of La2NiMnO6 [1, 4]
Summary
Original content from this work may be used under the terms of the Creative Abstract. Any further distribution of magnetic transition below ∼6 K to a ferrimagnetic state. This behavior is interpreted as arising from a this work must maintain attribution to the long-range ordering of Nd moments antiferromagnetically coupled to the ferromagnetic Ni–Mn author(s) and the title of ordered moments. Magnetic state by the application of an external magnetic field, established in our earlier study, it has a remarkable inverse magneto-caloric effect (IMCE) at low temperatures (T < 50 K) together with a significant conventional magneto-caloric effect (CMCE) at the ferromagnetic ordering temperature (Tc ∼ 200 K). Nd2NiMnO6 with its second order phase transition follows the universal dependency on the magnetic field as DSM μ H h
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