An XAFS Study on the Electronic Structure Study of the Boron Substituted CuFeO2
CuFeO2 is a well known antiferromagnetic material due to its geometrically frustrated antiferromagnetic (AFM) [TN=11K] character. Besides, delafossite CuFeO2oxide crystal is known to be under the influence of oxygen nonstoichiometry as a result of the change in cation valence bands. In this study, boron atoms were substituted in the Fe coordination and the electronic response on irons valence band is probed. Also, the possible influence of boron substitution on the electrical properties via the photoelectrons’ mean free path is investigated. Due to the high difference in the ionic radii of the host and substituted atoms, different crystal structure formation was expected. However, calculations showed that boron atoms tend to locate in Fe coordination and preferred to be part of the host crystal by bonding with the oxygen atoms. In addition, the presence of the light boron atoms was determined to weaken the scattering intensities which cause a longer mean free path for the photoelectrons which means better conductivity of the material.
Keywords:
Absorption, XAFS, Electronic Structure Crystal Structure,
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- Ozkendir, O.M., The electronic structure study of Fe L3 edge in CuFeO2, J. Optoelectron. Adv. Mater. Rapid Commun, 3, 586-591, 2009.
- Eerenstein, W., Mathur, N.D., Scott, J.F., Multiferroic and magnetoelectric materials, Nature, 442, 759, 2006.
- Ozkendir, O.M., Boron Activity in Metal Containing Materials, Advanced Journal of Chemistry, Section B: Natural Products and Medical Chemistry, 2 (2), 48-54, 2020.
- Ozkendir, O.M., Yuzer, A., Influence of Sm-substitution on the crystal and electronic structure of the FeBO3 oxide, Journal of Optoelectronics and Advanced Materials, 20(3-4), 201-207, 2018.
- Ozkendir, O.M., Crystal and Electronic Study of Neodymium-Substituted CuFeO2 Oxide, Metallurgical and Materials Transactions A, 47(6), 2906-2913, 2016.
- Thole, B.T., Carra, P., Sette, F., Van der Laan, G., X-ray circular dichroism as a probe of orbital magnetization, Phys. Rev. Lett., 68, 1943, 1992.
- Gall, D., Electron mean free path in elemental metals, Journal of Applied Physics, 119, 085101, 2016.
- Ozkendir, O.M., Crystal and Electronic Study of Neodymium-Substituted CuFeO2 Oxide, Metallurgical Materials and Metals Transaction A, 47A, 2906-2913, 2016.
- Ozkendir, O.M., Structural and Magnetic Study of CuxFeCr1−xO2 Oxides Under High External Magnetic Fields, J. Electron. Mater., 42(6), 1055–1062, 2013.
- Ankudinov, A.L., Ravel, B., Rehr, J.J., Conradson, S.D., Relativistic calculations of spin-dependent x-ray-absorption spectra, Phys. Rev. B, 56, R1712, 1997.
- Ravel, B., ATOMS: crystallography for the X-ray absorption spectroscopist, J. Synchrotron Radiat., 8(2), 314, 2001.
- Lutterotti, L., Chateigner, D., Ferrari, S., Ricote, J., Texture, residual stress and structural analysis of thin films using a combined X-ray analysis, Thin Solid Films, 450, 34-41, 2004.
- Başlangıç: 2009
- Yayıncı: Akdeniz Üniversitesi