Berlin 2005 – scientific programme
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MA: Magnetismus
MA 20: Poster:Schichten(1-29),Spintrsp(30-45),Ex-Bias(46-63),Spindyn(64-75),Mikromat.(76-80),Cluster(81-94),Abbv.(95-99),Obflm(100-02),SpElek.(103-09),E-Theo(110-14),Mikromag.(115-16),Spin+PÜ(117-26),Mag.Mat.(127-51),Meth.(152-55),Mol.Mag(156-59),Kondo(160-65
MA 20.27: Poster
Monday, March 7, 2005, 14:00–18:00, Poster TU C
Growth of thin Ni2MnIn Heusler alloy films on in-situ cleaved InAs (110)-surfaces — •Mahdi Mahajeri, Jan M. Scholtyssek, Malte A. Kurfiß, Malte Lieske, Rainer Anton, and Guido Meier — Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstr. 11, 20355 Hamburg
Heusler alloys are interesting candidates as spin-injectors in prospective spintronic devices. A spinpolarisation of 100% is predicted for the Ni2MnIn/InAs interface. In particular, this was calculated for the (100) and (110)-planes [1]. We fabricate thin Ni2MnIn films by coevaporating Ni and a MnIn alloy from two independent sources. The usage of only two crucibles is possible due to the similar vapour pressures of Mn and In. The layers are deposited on the (110)-surface of in situ cleaved InAs and on amorphous carbon films. The latter are used for stoichiometric, morphological, and structural investigations in a transmission-electron microscope. We measure the resistivity ρ(T) of the samples grown on InAs. The same samples are used for determination of the spinpolarisation by point contact Andreev-reflection spectroscopy (PCAR) [2]. Investigations concerning the magnetic properties of the layers are performed using a SQUID-magnetometer [3].
[1] K. A. Kilian and R. H. Victora. J. Appl. Phys. 87, 7064 (2000)
[2] S. von Oehsen, et. al. JMMM, accepted (09/2004)
[3] M. Kurfiß, et. al. JMMM, accepted (10/2004)