Spin canted magnetism, decoupling of charge and spin ordering in NdNiO${}_3$

Abstract

We report detailed magnetization measurements on the perovskite oxide NdNiO${}_3$. This system has a first order metal-insulator (M-I) transition at about 200 K which is associated with charge ordering. There is also a concurrent paramagnetic to antiferromagnetic spin ordering transition in the system. We show that the antiferromagnetic state of the nickel sublattice is spin canted. We also show that the concurrency of the charge ordering and spin ordering transitions is seen only while warming up the system from low temperature. The transitions are not concurrent while cooling the system through the M-I transition temperature. This is explained based on the fact that the charge ordering transition is first order while the spin ordering transition is continuous. In the magnetically ordered state the system exhibits ZFC-FC irreversibilities, as well as history-dependent magnetization and aging. Our analysis rules out the possibility of spin-glass or superparamagnetism and suggests that the irreversibilities originate from magnetocrystalline anisotropy and domain wall pinning.

8 pages, 7 figures

References in corpus (5)

• Spin-half paramagnetism in graphene induced by point defects
• Signatures of Spin Glass Freezing in NiO Nanoparticles
• Role of magnetic and orbital ordering at the metal-insulator transition in NdNiO3
• The origin of the non-monotonic field dependence of the blocking temperature in magnetic nanoparticles
• Effect of strain on the orbital and magnetic ordering of manganite thin films and their interface with an insulator

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• Unconventional Spin-Glass-Like State in AgCo2V3O10, the Novel Magnetically Frustrated Material
• Spin-glass like dynamics of ferromagnetic clusters in La${}_{0.75}$Ba${}_{0.25}$CoO${}_3$
• Magnetic excitations of perovskite rare-earth nickelates: RNiO${}_3$