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Porous silicon/metal nanocomposite with tailored magnetic properties
Author(s) -
Granitzer Petra,
Rumpf Klemens,
Poelt Peter,
Krenn Heinz
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200881013
Subject(s) - materials science , nanocomposite , porous silicon , coercivity , ferromagnetism , galvanic cell , porosity , silicon , nanotechnology , metal , deposition (geology) , magnetoresistance , magnetic anisotropy , porous medium , composite material , chemical engineering , condensed matter physics , optoelectronics , metallurgy , magnetization , magnetic field , paleontology , physics , biology , quantum mechanics , sediment , engineering
Abstract Porous silicon (PS) templates in the meso/macro porous regime with oriented pores clearly separated from each other and filled in a galvanic deposition process with various metals, especially ferromagnetic ones are magnetically investigated. The employment of different metals (e.g. Ni, Co, NiCo) together with the variation of the electrochemical deposition parameters modifies the structural characteristics of the PS/metal nanocomposite and thus leads to distinct magnetic properties of the hybrid system. Furthermore the use of different PS‐templates which means a change of the pore‐diameter and interpore spacing results also in various magnetic characteristics, especially influences on the magnetic interactions among the deposited metal nanostructures. Therefore the specimens show tailored magnetic properties like coercivity, squareness and magnetic anisotropy. The achieved nanocomposite merges electronic properties of a semiconductor with nanomagnetism and therefore opens the possibility of integrated spin‐based electronic devices. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)