Anisotropy Enhancement in Co Granular Multilayers by Capping


Article Preview

The effect of capping with Cu, Au and Pt of an array of Co nanoparticles is revised. The magnetic surface anisotropy KS was found to be the dominant contribution to the effective anisotropy Keff of the particles. Recent X-ray Magnetic Circular Dichroism (XMCD) measurements show that there is hybridization between the 3d Co electrons and the d and 4p electrons of the capping metal. By comparison to the mechanisms which give rise to the surface anisotropy in thin films, it is argued that this hybridization governs the modification of KS, and hence, of Keff.



Edited by:

Dílson S. dos Santos




J. Bartolomé et al., "Anisotropy Enhancement in Co Granular Multilayers by Capping", Materials Science Forum, Vol. 570, pp. 1-9, 2008

Online since:

February 2008




[1] J. Briático, J.L. Maurice, J. Carrey, D. Imhoff, F. Petroff and A. Vaures: Eur. Phys. J. D 9, 517 (1999); J.L. Maurice, J. Briático, J. Carrey, F. Petroff, L.F. Schelp and A. Vaurès: Phil. Mag. A 79, 2921 (1999).

DOI: 10.1007/978-3-642-88188-6_104

[2] J.M. Torres, F. Luis, L.M. García, J. Bartolomé, J. Stankiewicz, F. Petroff, F. Fettar and A. Vaures: J. Magn. & Magn. Mat. 242, 575 (2002).

[3] Y.S. Lee, J.Y. Rhee, C.N. Wang and Y.P. Lee: Phys. Rev. B 68, 235111 (2003).

[4] F. Luis, J.M. Torres, L.M. García, J. Bartolomé, J. Stankiewicz, F. Petroff. F. Fettar, J.L. Maurice and A. Vaures: Phys. Rev. B 65, 094409 (2002).

[5] J. Bartolomé, F. Luis, F. Petroff, F. Bartolomé, L.M. García, V. Cross and H. Jaffres: Phys. Met. Metallograph. 99, S8 (2005).

[6] F. Luis, F. Bartolomé, F. Petroff, J. Bartolomé, L.M. García, C. Deranlot, H. Jaffrès, M.J. Martínez, P. Bencock, F. Wilhelm, A. Rogalev and N.B. Brookes: Europhys. Lett. 76, 142 (2006).

DOI: 10.1209/epl/i2006-10242-2

[7] J. Bartolomé, L.M. García, F. Bartolomé, F. Luis, F. Petroff, C. Deranlot, F. Wilhelm and A. Rogalev: J. Magn. & Magn. Mat. 316, e9 (2007). Note that the value given for mL/mS=0. 1 in this reference for Pt has been modified to mL/mS=0. 22.

DOI: 10.1016/j.jmmm.2007.02.060

[8] M. Jamet, M. Négrier, V. Dupuis, J. Tuallion-CombesP. Melinon, A- Pérez, W. Werrnsdorfer, B. Barbara and B. Baguenard: J. Magn. & Magn. Mat. 237, 293 (2001).

[9] M. Jamet, W. Wernsdorfer, C. Thirion, D. Mailly, V. Dupuis, P. Mélinon and A. Perez: Phys. Rev. Lett. 86, 4676 (2001); M. Jamet, W. Wernsdorfer, C. Thirion, V. Dupuis, P. Mélinon, A. Perez. and D. Mailly: Phys. Rev.B. 69, 024401 (2004).

DOI: 10.1103/physrevlett.86.4676

[10] Y. Xie and J. Blackman: J. Phys. C: Condens. Matter 16, 3163 (2004).

[11] W.A. Sucksmith and J.E. Thompson: Proc. R. Soc. London 225, 362 (1954).

[12] C. Binns and M.J. Maher: New Journal of Physics 4, 85 (2002).

[13] S. Gangopadhyay, G.C. Hadjipanayis, C.M. Sorensen ans K.J. Klabunde: J. Appl. Phys. 73, 6964 (1993).

[14] V. Dupuis, L. Favre, S. Stanescu, J. Tuallion-Combes, E. Bernstein and A. Perez. J. Phys.: Condens. Matter 16, S2231 (2004).

[15] Y. Xie and J.A. Blackman: Phys. Rev. B 74, 054401 (2006).

[16] D.S. Wang, R. Wu and A.J. Freeman: J. Magn. & Magn. Mat. 129, 237 (1994).

[17] J. Stöhr: J. Magn. & Magn. Mat. 200, 470 (1999).

[18] R. Wu and A.J. Freeman: J. Magn. & Magn. Mat. 200, 498 (1999).

[19] B. Újfalussy, L. Szunyogh, P. Bruno and P. Weinberger: Phys. Rev. Lett. 77, 1805 (1996).

[20] L. Szunyogh, B. Újfalussy, U. Pustogowa and P. Weinberger: Phys. Rev. B 57, 8838 (1998).

[21] P. Bruno: Phys. Rev. B, 39, 865 (1989).

[22] C.T. Chen et al.; Phys. Rev. Lett. 75, 152 (1995).

[23] L.M. García, F. Bartolomé, J. Bartolomé, F. Luis, F. Petroff, C. Deranlot, F. Wilhelm, A. Rogalev, P. Bencok and N.B. Brookes: J. Magn. & Magn. Mat. 316, e23 (2007).

DOI: 10.4028/

[24] C. Ederer, M. Komelj, M. Fähnle and G. Schulz: Phys. Rev. B 66, 094413 (2002).

[25] M. Vijayakumar and M.S. Gopinathan: J. Mol. Struc. (Theochem) 361, 15 (1996).

[26] S. Pizzini, A. Fontaine, Ch. Giorgetti, E. Dartyge, J.F. Bobo, M. Piecuch and F. Baudelet: Phys. Rev. B 74, 1470 (1995); M. G. Samant, J. Stöhr, S.S.P. Parkin, G.A. Geld, B.D. Hermsmeier and F. Herman: Phys. Rev. 72, 1112 (1994).

DOI: 10.1103/physrevlett.74.1470

[27] F. Wilhelm, M. Angelakeris, N. Jaouen, P. Poulopoulos, E. Th. Papaioannou, Ch. Mueller, P. Fumagalli, A. Rogalev and N.K. Flevaris: Phys. Rev. B 69, 220404® (2004).

DOI: 10.1103/physrevb.69.220404

[28] D. Weller, Y. Wu, J. Stöhr, M.G. Samant, B.D. Hermensmeir and C. Chappert: Phys. Rev. B 49, 12888 (1994).

[29] J. Arbiol, F. Peiró, A. Cornet, C. Clavero, A. Cebollada, G. Armellas, and Y. Huttel: Appl. Phys. Lett. 86, 032510 (2005).

Fetching data from Crossref.
This may take some time to load.