Anomalous behaviour of the magnetic hysteresis loop in the alpha-Fe2O3/SiO2 nanocomposite
Abstract
The alpha-Fe2O3/SiO2 nanocomposite containing 45 wt.% of hematite was prepared by the sol-gel method and characterized by using X-ray diffractometer (XRD), transmission electron microscopy (TEM) and. superconducting quantum interference device (SQUID) magnetometer. TEM microscopy showed spherical particles with average size about 10 nm, whereas XRD diffraction confirmed the formation of the hematite phase. The magnetic measurements showed anomalous behavior of the hysteresis loops including decrease of high field isothermal magnetization and overlap of initial, remagnetization and magnetization curves. This anomalous behavior represents a novel effect for alpha-Fe2O3/SiO2 nanocomposites. We conjecture that a field-induced antiferromagnetic coupling between nanoparticles may produce this effect. (C) 2009 Elsevier B.V. All rights reserved.
Keywords:
Sol-gel preparation / Hematite / Nanocomposites / Magnetic materialsSource:
Materials Letters, 2009, 63, 12, 1054-1056Funding / projects:
- Ministry of Science [141027]
DOI: 10.1016/j.matlet.2009.02.011
ISSN: 0167-577X
WoS: 000265152700029
Scopus: 2-s2.0-62349089553
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Institution/Community
VinčaTY - JOUR AU - Tadić, Marin AU - Kusigerski, Vladan AU - Marković, Dragana AU - Milošević, Irena AU - Spasojević, Vojislav PY - 2009 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3675 AB - The alpha-Fe2O3/SiO2 nanocomposite containing 45 wt.% of hematite was prepared by the sol-gel method and characterized by using X-ray diffractometer (XRD), transmission electron microscopy (TEM) and. superconducting quantum interference device (SQUID) magnetometer. TEM microscopy showed spherical particles with average size about 10 nm, whereas XRD diffraction confirmed the formation of the hematite phase. The magnetic measurements showed anomalous behavior of the hysteresis loops including decrease of high field isothermal magnetization and overlap of initial, remagnetization and magnetization curves. This anomalous behavior represents a novel effect for alpha-Fe2O3/SiO2 nanocomposites. We conjecture that a field-induced antiferromagnetic coupling between nanoparticles may produce this effect. (C) 2009 Elsevier B.V. All rights reserved. T2 - Materials Letters T1 - Anomalous behaviour of the magnetic hysteresis loop in the alpha-Fe2O3/SiO2 nanocomposite VL - 63 IS - 12 SP - 1054 EP - 1056 DO - 10.1016/j.matlet.2009.02.011 ER -
@article{ author = "Tadić, Marin and Kusigerski, Vladan and Marković, Dragana and Milošević, Irena and Spasojević, Vojislav", year = "2009", abstract = "The alpha-Fe2O3/SiO2 nanocomposite containing 45 wt.% of hematite was prepared by the sol-gel method and characterized by using X-ray diffractometer (XRD), transmission electron microscopy (TEM) and. superconducting quantum interference device (SQUID) magnetometer. TEM microscopy showed spherical particles with average size about 10 nm, whereas XRD diffraction confirmed the formation of the hematite phase. The magnetic measurements showed anomalous behavior of the hysteresis loops including decrease of high field isothermal magnetization and overlap of initial, remagnetization and magnetization curves. This anomalous behavior represents a novel effect for alpha-Fe2O3/SiO2 nanocomposites. We conjecture that a field-induced antiferromagnetic coupling between nanoparticles may produce this effect. (C) 2009 Elsevier B.V. All rights reserved.", journal = "Materials Letters", title = "Anomalous behaviour of the magnetic hysteresis loop in the alpha-Fe2O3/SiO2 nanocomposite", volume = "63", number = "12", pages = "1054-1056", doi = "10.1016/j.matlet.2009.02.011" }
Tadić, M., Kusigerski, V., Marković, D., Milošević, I.,& Spasojević, V.. (2009). Anomalous behaviour of the magnetic hysteresis loop in the alpha-Fe2O3/SiO2 nanocomposite. in Materials Letters, 63(12), 1054-1056. https://doi.org/10.1016/j.matlet.2009.02.011
Tadić M, Kusigerski V, Marković D, Milošević I, Spasojević V. Anomalous behaviour of the magnetic hysteresis loop in the alpha-Fe2O3/SiO2 nanocomposite. in Materials Letters. 2009;63(12):1054-1056. doi:10.1016/j.matlet.2009.02.011 .
Tadić, Marin, Kusigerski, Vladan, Marković, Dragana, Milošević, Irena, Spasojević, Vojislav, "Anomalous behaviour of the magnetic hysteresis loop in the alpha-Fe2O3/SiO2 nanocomposite" in Materials Letters, 63, no. 12 (2009):1054-1056, https://doi.org/10.1016/j.matlet.2009.02.011 . .