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Investigations of the heterometallic ludwigite Ni2AlBO5.

Authors
  • Kumar, Jitender1
  • Mukkattukavil, Deepak John
  • Bhattacharyya, Arpan
  • Nair, Sunil
  • 1 Department of Physics, Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pune, Maharashtra-411008, India. , (India)
Type
Published Article
Journal
Journal of Physics Condensed Matter
Publisher
IOP Publishing
Publication Date
Feb 06, 2020
Volume
32
Issue
6
Pages
65601–65601
Identifiers
DOI: 10.1088/1361-648X/ab4f5c
PMID: 31627197
Source
Medline
Language
English
License
Unknown

Abstract

We present magnetic, thermodynamic, dielectric and structural investigations on the aluminoborate Ni2AlBO5, belonging to the ludwigite family. Room temperature structural refinement suggests that the system crystallizes in the orthorhombic Pbam symmetry, in similarity with most members of this material class. Magnetic and thermodynamic measurements shows that the system undergoes a phase transition to an antiferromagnetic state at 38 K, signatures of which are also seen in the lattice parameters and the dielectric constant. Short range magnetic correlations appear to persist to much higher temperatures-a regime in which the ac susceptibility exhibits a power law temperature dependence, in agreement with that expected for random exchange Heisenberg antiferromagnetic spin chains.

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