Magnetic and Mössbauer characterization of the magnetic properties of single-crystalline sub-micron sized Bi₂Fe₄O₉ cubes
- Villanova Univ., Villanova, PA (United States)
- State Univ. of New York at Stony Brook, Stony Brook, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Univ., et INSA de Rouen, Saint Etienne du Rouvray, Cedex (France)
- State Univ. of New York at Stony Brook, Stony Brook, NY (United States)
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.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC00112704; AC02-98CH10886
- OSTI ID:
- 1182526
- Alternate ID(s):
- OSTI ID: 1251709
- Report Number(s):
- BNL-107583-2015-JA; R&D Project: PM037; KC0201030
- Journal Information:
- Current Applied Physics, Vol. 15, Issue 3; ISSN 1567-1739
- Publisher:
- Korean Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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