Enhanced Orbital Magnetism in Fe50Pt50 Nanoparticles
作者： C. Antoniak , J. Lindner , M. Spasova , D. Sudfeld , M. Acet
DOI: 10.1103/PHYSREVLETT.97.117201
关键词:
摘要: X-ray absorption and magnetic circular dichroism spectra at both the Fe Pt L{sub 3,2} edges were measured on wet-chemically synthesized monodisperse Fe{sub 50}Pt{sub 50} particles with a mean diameter of 6.3 nm before after complete removal organic ligands oxide shell covering by soft hydrogen plasma resulting in pure metallic state. After thermal treatment particles, coercive field increased factor 6, orbital moment site 330% is reduced 30%, while effective spin moments did not change. A decrease frequency oscillations extended x-ray fine structure provides evidence for crystallographic changes towards L1{sub 0} phase.
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W. Grange, M. Maret, J.-P Kappler, J. Vogel, A. Fontaine, F. Petroff, G. Krill, A. Rogalev, J. Goulon, M. Finazzi, N. B. Brookes, Magnetocrystalline anisotropy in (111) CoPt 3 thin films probed by x-ray magnetic circular dichroism Physical Review B. ,vol. 58, pp. 6298- 6304 ,(1998) , 10.1103/PHYSREVB.58.6298
Reiko Nakajima, J Stöhr, Yves U Idzerda, None, Electron-yield saturation effects in L-edge x-ray magnetic circular dichroism spectra of Fe, Co, and Ni Physical Review B. ,vol. 59, pp. 6421- 6429 ,(1999) , 10.1103/PHYSREVB.59.6421
B. Stahl, J. Ellrich, R. Theissmann, M. Ghafari, S. Bhattacharya, H. Hahn, N. S. Gajbhiye, D. Kramer, R. N. Viswanath, J. Weissmüller, H. Gleiter, Electronic properties of 4-nm FePt particles Physical Review B. ,vol. 67, pp. 014422- ,(2003) , 10.1103/PHYSREVB.67.014422
H.-G. Boyen, K. Fauth, B. Stahl, P. Ziemann, G. Kästle, F. Weigl, F. Banhart, M. Hessler, G. Schütz, N. S. Gajbhiye, J. Ellrich, H. Hahn, M. Büttner, M. G. Garnier, P. Oelhafen, Electronic and Magnetic Properties of Ligand-Free FePt Nanoparticles† Advanced Materials. ,vol. 17, pp. 574- 578 ,(2005) , 10.1002/ADMA.200400748
K. Fauth, How well does total electron yield measure x-ray absorption in nanoparticles? Applied Physics Letters. ,vol. 85, pp. 3271- 3273 ,(2004) , 10.1063/1.1804600
Paolo Carra, B. T. Thole, Massimo Altarelli, Xindong Wang, X-RAY CIRCULAR-DICHROISM AND LOCAL MAGNETIC-FIELDS Physical Review Letters. ,vol. 70, pp. 694- 697 ,(1993) , 10.1103/PHYSREVLETT.70.694
I. Galanakis, M. Alouani, H. Dreyssé, Calculated magnetic properties of low-dimensional systems: the AuCu- and AuCu3-type ferromagnets Journal of Magnetism and Magnetic Materials. ,vol. 242-245, pp. 27- 32 ,(2002) , 10.1016/S0304-8853(01)01179-9
Shouheng Sun, Christopher B Murray, Dieter Weller, Liesl Folks, Andreas Moser, Monodisperse FePt Nanoparticles and Ferromagnetic FePt Nanocrystal Superlattices Science. ,vol. 287, pp. 1989- 1992 ,(2000) , 10.1126/SCIENCE.287.5460.1989
Bernd Rellinghaus, Sonja Stappert, Mehmed Acet, Eberhard F Wassermann, Magnetic properties of FePt nanoparticles Journal of Magnetism and Magnetic Materials. ,vol. 266, pp. 142- 154 ,(2003) , 10.1016/S0304-8853(03)00465-7
S. Anders, M. F. Toney, T. Thomson, J.-U. Thiele, B. D. Terris, Shouheng Sun, C. B. Murray, X-ray studies of magnetic nanoparticle assemblies Journal of Applied Physics. ,vol. 93, pp. 7343- 7345 ,(2003) , 10.1063/1.1543864