Magnetic and Mössbauer characterization of the magnetic properties of single-crystalline sub-micron sized Bi₂Fe₄O₉ cubes [electronic resource]
Bi₂Fe₄O₉; MöSsbauer.
Saved in:
| Online Access: |
Online Access |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. Office of Basic Energy Sciences ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2014.
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| Subjects: |
| Summary: | Bi₂Fe₄O₉; MöSsbauer. |
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| Abstract: | 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. |
| Item Description: | Published through SciTech Connect. 11/25/2014. "bnl--107583-2015-ja" "KC0201030" Current Applied Physics 15 3 ISSN 1567-1739 AM. Park, Tae-Jin; Le Breton, Jean-Marie; Wong, Stanislaus S.; Papaefthymiou, Georgia C.; Brookhaven National Lab.; Viescas, Arthur J.; Chiron, Hubert; Juraszek, Jean. |
| Physical Description: | p. 417-422 : digital, PDF file. |