skip to main content

DOE PAGESDOE PAGES

Title: Magnetic and Mössbauer characterization of the magnetic properties of single-crystalline sub-micron sized Bi₂Fe₄O₉ cubes

Magnetic and Mössbauer characterization of single crystalline, sub-micron sized Bi₂Fe₄O₉ cubes has been performed using SQUID magnetometry and transmission Mössbauer spectroscopy in the temperature range of 4.2 K ≤ T ≤ 300 K. A broad magnetic phase transition from the paramagnetic to the anti-ferromagnetic state is observed below 250 K, with the Mössbauer spectra exhibiting a superposition of magnetic, collapsed and quadrupolar spectra in the transition region of 200 K < T < 245 K. Room temperature Mössbauer spectra obtained in transmission geometry are identical to those recorded in back-scattering geometry via conversion electron Mössbauer spectroscopy, indicating the absence of strain at the surface. A small hysteresis loop is observed in SQUID measurements at 5 K, attributable to the presence of weak-ferromagnetism arising from the canting of Fe³⁺ ion sublattices in the antiferromagnetic matrix.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [3] ;  [3] ;  [4]
  1. Villanova Univ., Villanova, PA (United States)
  2. State Univ. of New York at Stony Brook, Stony Brook, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Univ., et INSA de Rouen, Saint Etienne du Rouvray, Cedex (France)
  4. State Univ. of New York at Stony Brook, Stony Brook, NY (United States)
Publication Date:
OSTI Identifier:
1182526
Report Number(s):
BNL--107583-2015-JA
Journal ID: ISSN 1567-1739; R&D Project: PM037; KC0201030
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Current Applied Physics
Additional Journal Information:
Journal Volume: 15; Journal Issue: 3; Journal ID: ISSN 1567-1739
Publisher:
Korean Physical Society
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Bi₂Fe₄O₉; Mössbauer