Unusual temperature dependence of coercivity in ε-Fe2O3 phase
Само за регистроване кориснике
2018
Конференцијски прилог (Објављена верзија)
,
© 2018 TANGER Ltd. All Rights Reserved
Метаподаци
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Nano iron oxides have been intensively investigated due to their various potential biomedical applications. ε-Fe2O3 phase exerted internal coercivity value up to ~20 kOe, high Curie temperature (Tc= 510 K), and magnetoelectric character. Accordingly, epsilon phase is recognized as a suitable material for medical spintronic biosensors production, that present important part for the lab-on-a-chip systems. Noteworthy, ε-Fe2O3 phase exerts peculiar magnetic behavior. To get better insight into the magnetism of this material, ε-Fe2O3/SiO2 sample was prepared by the combination of the sol-gel synthesis and microemulsion method (Tann=1050 °C, tann= 4h). Afterwards, the sample was exposed to post-annealing treatment at 100 °C and 200 °C. Synthesized material was preliminary examined by XRD and SQUID techniques. Coercivity changes, induced by the post-annealing temperature oscillations, were monitored by hysteretic measurements. Sample annealed at 1050 °C for 4h, showed coercivity ~20 kOe. The ...same sample performed to the post-annealing treatment at 100 °C, exerted significantly decreased coercivity (~1600 Oe). Further rise of the post-annealing temperature (200 °C) resulted in the increased coercivity ~15 kOe. Obtained study showed that there is insufficient knowledge concerning the ε-Fe2O3 coercivity changes of the polymorph. The more detailed investigation will be conducted, in order to advance the control of the epsilon phase magnetic properties. © 2018 TANGER Ltd. All Rights Reserved.
Кључне речи:
Coercivity / Phase transformations / Ε-Fe2O3 phaseИзвор:
NANOCON 2017 : 9th International Conference on Nanomaterials - Research and Application : Conference Proceedings, 2018, 27-32Финансирање / пројекти:
- Магнетни и радионуклидима обележени наноструктурни материјали за примене у медицини (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45015)
Напомена:
- 9th International Conference on Nanomaterials - Research and Application, NANOCON 2017; Hotel Voronez IBrno; Czech Republic; October 18 - 20 2017; Code 135697
Колекције
Институција/група
VinčaTY - CONF AU - Nikolić, Violeta N. AU - Tadić, Marin AU - Mraković, Ana Đ. AU - Spasojević, Vojislav PY - 2018 UR - https://vinar.vin.bg.ac.rs/handle/123456789/7850 AB - Nano iron oxides have been intensively investigated due to their various potential biomedical applications. ε-Fe2O3 phase exerted internal coercivity value up to ~20 kOe, high Curie temperature (Tc= 510 K), and magnetoelectric character. Accordingly, epsilon phase is recognized as a suitable material for medical spintronic biosensors production, that present important part for the lab-on-a-chip systems. Noteworthy, ε-Fe2O3 phase exerts peculiar magnetic behavior. To get better insight into the magnetism of this material, ε-Fe2O3/SiO2 sample was prepared by the combination of the sol-gel synthesis and microemulsion method (Tann=1050 °C, tann= 4h). Afterwards, the sample was exposed to post-annealing treatment at 100 °C and 200 °C. Synthesized material was preliminary examined by XRD and SQUID techniques. Coercivity changes, induced by the post-annealing temperature oscillations, were monitored by hysteretic measurements. Sample annealed at 1050 °C for 4h, showed coercivity ~20 kOe. The same sample performed to the post-annealing treatment at 100 °C, exerted significantly decreased coercivity (~1600 Oe). Further rise of the post-annealing temperature (200 °C) resulted in the increased coercivity ~15 kOe. Obtained study showed that there is insufficient knowledge concerning the ε-Fe2O3 coercivity changes of the polymorph. The more detailed investigation will be conducted, in order to advance the control of the epsilon phase magnetic properties. © 2018 TANGER Ltd. All Rights Reserved. C3 - NANOCON 2017 : 9th International Conference on Nanomaterials - Research and Application : Conference Proceedings T1 - Unusual temperature dependence of coercivity in ε-Fe2O3 phase SP - 27 EP - 32 UR - https://hdl.handle.net/21.15107/rcub_vinar_7850 ER -
@conference{ author = "Nikolić, Violeta N. and Tadić, Marin and Mraković, Ana Đ. and Spasojević, Vojislav", year = "2018", abstract = "Nano iron oxides have been intensively investigated due to their various potential biomedical applications. ε-Fe2O3 phase exerted internal coercivity value up to ~20 kOe, high Curie temperature (Tc= 510 K), and magnetoelectric character. Accordingly, epsilon phase is recognized as a suitable material for medical spintronic biosensors production, that present important part for the lab-on-a-chip systems. Noteworthy, ε-Fe2O3 phase exerts peculiar magnetic behavior. To get better insight into the magnetism of this material, ε-Fe2O3/SiO2 sample was prepared by the combination of the sol-gel synthesis and microemulsion method (Tann=1050 °C, tann= 4h). Afterwards, the sample was exposed to post-annealing treatment at 100 °C and 200 °C. Synthesized material was preliminary examined by XRD and SQUID techniques. Coercivity changes, induced by the post-annealing temperature oscillations, were monitored by hysteretic measurements. Sample annealed at 1050 °C for 4h, showed coercivity ~20 kOe. The same sample performed to the post-annealing treatment at 100 °C, exerted significantly decreased coercivity (~1600 Oe). Further rise of the post-annealing temperature (200 °C) resulted in the increased coercivity ~15 kOe. Obtained study showed that there is insufficient knowledge concerning the ε-Fe2O3 coercivity changes of the polymorph. The more detailed investigation will be conducted, in order to advance the control of the epsilon phase magnetic properties. © 2018 TANGER Ltd. All Rights Reserved.", journal = "NANOCON 2017 : 9th International Conference on Nanomaterials - Research and Application : Conference Proceedings", title = "Unusual temperature dependence of coercivity in ε-Fe2O3 phase", pages = "27-32", url = "https://hdl.handle.net/21.15107/rcub_vinar_7850" }
Nikolić, V. N., Tadić, M., Mraković, A. Đ.,& Spasojević, V.. (2018). Unusual temperature dependence of coercivity in ε-Fe2O3 phase. in NANOCON 2017 : 9th International Conference on Nanomaterials - Research and Application : Conference Proceedings, 27-32. https://hdl.handle.net/21.15107/rcub_vinar_7850
Nikolić VN, Tadić M, Mraković AĐ, Spasojević V. Unusual temperature dependence of coercivity in ε-Fe2O3 phase. in NANOCON 2017 : 9th International Conference on Nanomaterials - Research and Application : Conference Proceedings. 2018;:27-32. https://hdl.handle.net/21.15107/rcub_vinar_7850 .
Nikolić, Violeta N., Tadić, Marin, Mraković, Ana Đ., Spasojević, Vojislav, "Unusual temperature dependence of coercivity in ε-Fe2O3 phase" in NANOCON 2017 : 9th International Conference on Nanomaterials - Research and Application : Conference Proceedings (2018):27-32, https://hdl.handle.net/21.15107/rcub_vinar_7850 .