skip to main content

Title: Magnetic and dielectric behavior of the spin-chain compound Er₂BaNiO₅ well below its Néel temperature

We have recently reported that the Haldane spin-chain system, Er₂BaNiO₅, undergoing antiferromagnetic order below (T{sub N}=) 32 K, is characterized by the onset of ferroelectricity near 60 K due to magnetoelectric coupling induced by short-range magnetic-order within spin-chains. We have carried out additional magnetic and dielectric studies to understand the properties well below T{sub N}. We emphasize here on the following: (i) A strong frequency dependent behaviors of ac magnetic susceptibility and complex dielectric properties have been observed at much lower temperatures (<8 K), that is, “reentrant multiglass-like” phenomenon, naturally suggesting the existence of an additional transition well below T{sub N}. (ii) “Magnetoelectric phase coexistence” is observed at very low temperature (e.g., T=2 K), where the high-field magnetoelectric phase is partially arrested on returning to zero magnetic field after a cycling through metamagnetic transition.
Authors:
; ;  [1] ;  [2]
  1. Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005 (India)
  2. School of Basic Sciences, Indian Institute of Technology Bhubaneshwar, Bhubaneshwar 751013 (India)
Publication Date:
OSTI Identifier:
22306008
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTIFERROMAGNETISM; BARIUM COMPOUNDS; COUPLING; DIELECTRIC MATERIALS; DIELECTRIC PROPERTIES; ERBIUM COMPOUNDS; FREQUENCY DEPENDENCE; MAGNETIC FIELDS; MAGNETIC PROPERTIES; MAGNETIC SUSCEPTIBILITY; NEEL TEMPERATURE; NICKEL COMPOUNDS; OXYGEN COMPOUNDS; SPIN