Origin of the Intrinsic Coercivity Field Variations of ε-Fe2O3
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2019
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© 2019, Pleiades Publishing, Ltd.
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ε-Fe2O3 phase is recognized as an attractive material, in both technological and scientific point of view, since it can achieve very high room-temperature coercivity (10–20 kOe). In this paper, multi-phase samples Fe2O3/SiO2 with slightly different Fe/Si molar ratio were produced by sol–gel synthesis route. The obtained samples were characterized by various experimental techniques including XRD, TA, FTIR, and SQUID (DC and AC magnetic measurements). It was found that both samples consisted of α-Fe2O3 and ε‑Fe2O3 phases embedded in the silica matrix, and showed very similar structural and magnetic properties, except that displayed significantly different room-temperature intrinsic coercivity field values: HciS1 = 14.3 kOe and HciS2 = 7.5 kOe. We have discussed possible origin of thus high intrinsic coercivity field variation. © 2019, Pleiades Publishing, Ltd.
Keywords:
epsilon-Fe2O3 / sol-gel / intrinsic coercivity fieldSource:
Russian Journal of Physical Chemistry A, 2019, 93, 2, 377-383Funding / projects:
- Magnetic and radionuclide labeled nanostructured materials for medical applications (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45015)
DOI: 10.1134/S0036024419020316
ISSN: 0036-0244; 1531-863X
WoS: 000468852400032
Scopus: 2-s2.0-85066158349
Institution/Community
Inovacioni centarTY - JOUR AU - Nikolić, Violeta N. AU - Milić, Mirjana M. AU - Zdravković, Jelena D. AU - Spasojević, Vojislav PY - 2019 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5904 AB - ε-Fe2O3 phase is recognized as an attractive material, in both technological and scientific point of view, since it can achieve very high room-temperature coercivity (10–20 kOe). In this paper, multi-phase samples Fe2O3/SiO2 with slightly different Fe/Si molar ratio were produced by sol–gel synthesis route. The obtained samples were characterized by various experimental techniques including XRD, TA, FTIR, and SQUID (DC and AC magnetic measurements). It was found that both samples consisted of α-Fe2O3 and ε‑Fe2O3 phases embedded in the silica matrix, and showed very similar structural and magnetic properties, except that displayed significantly different room-temperature intrinsic coercivity field values: HciS1 = 14.3 kOe and HciS2 = 7.5 kOe. We have discussed possible origin of thus high intrinsic coercivity field variation. © 2019, Pleiades Publishing, Ltd. T2 - Russian Journal of Physical Chemistry A T1 - Origin of the Intrinsic Coercivity Field Variations of ε-Fe2O3 EP - 383 IS - 2 SP - 377 VL - 93 DO - 10.1134/S0036024419020316 ER -
@article{ author = "Nikolić, Violeta N. and Milić, Mirjana M. and Zdravković, Jelena D. and Spasojević, Vojislav", year = "2019", abstract = "ε-Fe2O3 phase is recognized as an attractive material, in both technological and scientific point of view, since it can achieve very high room-temperature coercivity (10–20 kOe). In this paper, multi-phase samples Fe2O3/SiO2 with slightly different Fe/Si molar ratio were produced by sol–gel synthesis route. The obtained samples were characterized by various experimental techniques including XRD, TA, FTIR, and SQUID (DC and AC magnetic measurements). It was found that both samples consisted of α-Fe2O3 and ε‑Fe2O3 phases embedded in the silica matrix, and showed very similar structural and magnetic properties, except that displayed significantly different room-temperature intrinsic coercivity field values: HciS1 = 14.3 kOe and HciS2 = 7.5 kOe. We have discussed possible origin of thus high intrinsic coercivity field variation. © 2019, Pleiades Publishing, Ltd.", journal = "Russian Journal of Physical Chemistry A", title = "Origin of the Intrinsic Coercivity Field Variations of ε-Fe2O3", pages = "383-377", number = "2", volume = "93", doi = "10.1134/S0036024419020316" }
Nikolić, V. N., Milić, M. M., Zdravković, J. D.,& Spasojević, V.. (2019). Origin of the Intrinsic Coercivity Field Variations of ε-Fe2O3. in Russian Journal of Physical Chemistry A, 93(2), 377-383. https://doi.org/10.1134/S0036024419020316
Nikolić VN, Milić MM, Zdravković JD, Spasojević V. Origin of the Intrinsic Coercivity Field Variations of ε-Fe2O3. in Russian Journal of Physical Chemistry A. 2019;93(2):377-383. doi:10.1134/S0036024419020316 .
Nikolić, Violeta N., Milić, Mirjana M., Zdravković, Jelena D., Spasojević, Vojislav, "Origin of the Intrinsic Coercivity Field Variations of ε-Fe2O3" in Russian Journal of Physical Chemistry A, 93, no. 2 (2019):377-383, https://doi.org/10.1134/S0036024419020316 . .