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Exchange bias and spin-phonon coupling in complex glassy layered perovskite SrLaMn0.5Ni0.5O4
Ranjana R. Das, P. Neenu Lekshmi,
Published in American Institute of Physics Inc.
2018
Volume: 8
   
Issue: 10
Abstract
In the present work, single-layered polycrystalline Ruddlesden-Popper oxide, SrLaMn0.5Ni0.5O4 (SLMNO) has been synthesized and characterized. X-ray diffraction and Raman spectroscopy revealed tetragonal crystal structure (I4/mmm) with lattice parameters of a = b = 3.8388 (4) Å and c =12.5593 (2) Å. XPS analysis confirms Mn4+/Ni2+ as the major valance state in SLMNO. Temperature evolution of dc magnetization suggests a ferromagnetic ordering below 130 K followed by a glassy like behaviour below 13 K. The ac susceptibility measurement corroborates the dc magnetization data and confirms cluster glass behavior at lower temperatures. Interestingly, SLMNO exhibits a negative exchange bias of ∼ 0.075 kOe at 5 K under field cooling of 50 kOe and also shows the existence of spin-phonon coupling. © 2018 Author(s).
About the journal
JournalData powered by TypesetAIP Advances
PublisherData powered by TypesetAmerican Institute of Physics Inc.
ISSN21583226
Open AccessNo
Concepts (18)
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    Crystal structure
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    Glass
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    Lanthanum compounds
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    Magnetic susceptibility
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    Magnetization
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    Nickel compounds
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    Perovskite
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    Phonons
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    Strontium compounds
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    Ac-susceptibility measurements
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    Ferromagnetic orderings
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    LAYERED PEROVSKITE
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    Lower temperatures
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    RUDDLESDEN-POPPER
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    SPIN-PHONON COUPLING
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    TEMPERATURE EVOLUTION
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    Tetragonal crystal structure
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    Manganese compounds