Characterization of oxygen passivated iron nanoparticles and thermal evolution to γ-Fe2O3
Source abstract
Abstract
Nanocrystalline iron powders have been prepared by the inert gas evaporation method. After preparation the material has been passivated by pure oxygen and air exposure. In the present paper we describe new characterization studies of this sample by Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), X-ray Absorption Spectroscopy (XAS), Electron Energy Loss Spectroscopy (EELS) and Mossbauer Spectroscopy (MS), giving a complete chemical and structural characterization of the nanocomposite material in order to correlate its microstructure with its singular magnetic behavior. This nanocomposite was later heated following different thermal treatments. It was found that the sample heated successively in high vacuum (10−7 torr) at 383 K for 1 h and under a residual oxygen pressure of 4 × 10−4 torr at 573 K for 3 h, results in a powder formed by nanoparticles of γ-Fe2O3 as stated from XRD, XAS and MS. This material is stable during several years and behaves almost totally like superparamagnetic at room temperature.
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Research context
OpenAlex topics: Iron oxide chemistry and applications · Magnetic Properties and Synthesis of Ferrites · Magnetic properties of thin films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (34)
Show source-provided references
1. E. MATIJEVIC, MRS Bull. XIV(1989) 19.
2. Y. YOSHIZAWA, S. OGUMA and K. YAMAUCHI, J. Appl. Phys. 64(1988) 6044.10.1063/1.342149 ↗
3. E. F. KNELLER and R. HAWIG, IEEE Trans. Magn.MAG-27(1991) 3588.10.1109/20.102931 ↗
4. S. W. CHARLES, in "Magnetic Properties of Fine Particles" edited by J. L. Dormann and D. Fiorani (Elsevier, Amsterdan, 1991) p. 2676.
5. W. WAGNER, H. VAN SWYGENHOVEN, H. J. H FLER and A. WIEDENMANN, Nanostruct. Mater. 6(1995) 929.10.1016/0965-9773(95)00212-X ↗
6. W. GONG, H. LI, Z. ZHAO and J. CHEN, J. Appl. Phys. 69(1991) 5119.10.1063/1.348144 ↗
7. S. GANGOPADHYAY, G. C. HADJIPANAYIS, S. I. SHAH, C. M. SORENSEN, K. J. KLABUNDE, V. PAPAEFTHYMIOU and A. KOSTIKAS, ibid. 70(1991) 5888.10.1063/1.350096 ↗
8. J. L ÖFFLER, H. VAN SWYGENHOVEN, W. WAGNER, J. MEIER, B. DOUDIN and J. PH. ANSERMET, Nanostruct. Mater. 9(1997) 523.10.1016/S0965-9773(97)00115-3 ↗
9. H. KISKER, T. GESSMANN, R. WÜRSCHUM, H. KRONMÜLLER and H. E. SCHAEFER, ibid. 6(1995) 925.10.1016/0965-9773(95)00211-1 ↗
10. S. GANGOPADHYAY, G. C. HADJIPANAYIS, B. DALE, C. M. SORENSEN and K. J. KLABUNDE, ibid. 1(1992) 77.10.1016/0965-9773(92)90056-4 ↗
11. W. H. MEIKLEJOHN and C. P. BEAN, Phys. Rev. 105(1957) 904.10.1103/PhysRev.105.904 ↗
12. L. DEL BIANCO, A. HERNANDO, M. MULTIGNER, C. PRADOS, J. C. SÁNCHEZ-LÓPEZ, A. FERNÁNDEZ, C. F. CONDE and A. CONDE, J. Appl. Phys. 84(1998) 2189.10.1063/1.368282 ↗
13. S. GANGOPADHYAY, G. C. HADJIPANAYIS, B. DALE, C. M. SORENSEN, K. J. KLABUNDE, V. PAPAEFTHYMIOU and A. KOSTIKAS, Phys. Rev.B45(1992) 9778.10.1103/PhysRevB.45.9778 ↗
14. L DEL BIANCO, D. FIORANI, A. M. TESTA, E. BONETTI, L. SAVINI and S. SIGNORETTI, Phys RevB 66(2002) 174418.10.1103/PhysRevB.66.174418 ↗
15. T. UCHIKOSHI, Y. SAKKA, YOSHITAKE and K. YOSHIHARA, Nanostruct. Mater. 4(1994) 199.10.1016/0965-9773(94)90078-7 ↗
16. J. L ÖFFLER, W. WAGNER, H. VAN SWYGENHOVEN and A. WIEDENMANN, ibid. 9(1997) 331.10.1016/S0965-9773(97)00076-7 ↗
17. L. THEIL KUHN, A. BOJESEN, L. TIMMERMANN, M. MEEDOM NIELSEN and S. MORUP, J. Phys.: Condens. Matter 14(2002) 13551.10.1088/0953-8984/14/49/311 ↗
18. J. C. S ÁNCHEZ-L ÓPEZ, A. JUSTO, A. FERN ÁNDEZ, C. F. CONDE and A. CONDE, Philos. Mag.B 76(1997) 663.10.1080/01418639708241132 ↗
19. J. C. S ÁNCHEZ-L ÓPEZ and A. FERNANDEZ, Mater Sci Forum 269-272(1998) 827.10.4028/www.scientific.net/MSF.269-272.827 ↗
20. C. PRADOS, M. MULTIGNER, A. HERNANDO, J. C. SANCHEZ-LOPEZ, A. FERNANDEZ, C. F. CONDE and A. CONDE, J. Appl. Phys. 85(1999) 6118.10.1063/1.370280 ↗
21. B. MARTINEZ, A. ROIH, X. OBRADORS, E. MOLINS, A. ROUANET and C. MONTY, ibid. 79(5) (1996) 2580.10.1063/1.361125 ↗
22. S. MORUP and S. LINDEROTH, in "Nanophase Materials, NATO ASI Series E: Applied Sciences," edited by G. C. Hadjipanayis and R. W. Siegel (Dordrecht, Kluwer, 1994) Vol. 260 p. 595.
23. H. GLEIDER, Avd. Mater. 4(1992) 479.
24. L. A. GRUNES, Phys. Rev. B 27(4) (1983) 2111.10.1103/PhysRevB.27.2111 ↗
25. M. J. SAYAGU ÉS, T. C. ROJAS, A. FERN ÁNDEZ, R. E. DUNIN-BORKOWSKY, R. C. DOOLE and J. L. HUTCHISON, Microscopy and Microanalysis 8(2002) 403.10.1017/S1431927602020135 ↗
26. T. C. ROJAS, J. C. S ÁNCHEZ-L ÓPEZ, M. J. SAYAGU ÉS, E. P. REDDY, A. CABALLERO and A. FERN ÁNDEZ, J. Mater. Chem. 9(1999) 1011.10.1039/a808098d ↗
27. A. BIANCONI, in "X-ray Absorption: Principles, Applications, Techniques of EXAFS, SEXAFS and XANES," edited by D. C. Konigsberger and R. Prins (JohnWiley, New York, 1988) Chap. 11, p. 573.
28. E. TRONC, P. PRENE, J. P. JOLIVET, F. D ÓRAZIO, F. LUCARI, D. FIORANI, M. GODINHO, R. CHEKAOUI, M. NOGUES and J. L. DORMANN, Hyper. Interact. 95(1995) 129.10.1007/BF02146310 ↗
29. H. HANEDA and A. H. MORRISH, Surf. Sci. 77(1978) 584.10.1016/0039-6028(78)90142-5 ↗
30. A. H. MORRISH and K. HANEDA, J. Magn. Magn. Mater. 35(1983) 105.10.1016/0304-8853(83)90468-7 ↗
31. N. RANDRIANANTOANDRO, P. LAFFEZ, C. SELLA and J. M. GRENECHE, Eur. J. Phys.: Appl. Phys. 9(2000) 125.10.1051/epjap:2000208 ↗
32. R. H. KODAMA, A. E. BERKOWITZ, E. J. MCNIFF and S. FONER, J. Appl. Phys. 81(1977) 5552.10.1063/1.364659 ↗
33. N. CABRERA and N. F. MOTT, Rep. Prog. Phys. 12(1949) 163.10.1088/0034-4885/12/1/308 ↗
34. J. C. SÁNCHEZ-LÓPEZ, A. JUSTO and A. FERN ÁNDEZ, Langmuir 15(1999) 7822.10.1021/la981718j ↗