Magnetic state of Nb(l-7nm)/Cu30Ni70 (6nm) superlattices revealed by Polarized Neutron Reflectometry and SQUID magnetometry

International Conference on Polarised Neutrons for Condensed Matter Investigations

Khaydukov, Yu^1,2,7 ; Morari, R.^3,4 ; Lenk, D.^3 ; Zdravkov, V.^3,4 ; Merkel, D.G.^5 ; Seidlhofer, B.-K.^6 ; Miiller, C.^3 ; Krug Von Nidda, H.-A.^3 ; Keller, T.^1,2 ; Steitz, R.^6 ; Sidorenko, A.^4 ; Horn, S.^3 ; Tidecks, R.^3 ; Keimer, B.^1

Max-Planck-Institut für Festkürperforschung, Stuttgart, Germany^1

Max Planck Society Outstation, FRM-II, Garching, Germany^2

Institut für Physik, Universitat Augsburg, Augsburg, Germany^3

D. Ghitsu Institute of Electronic Engineering and Nanotechnologies ASM, Kishinev, Moldova^4

Wigner Research Centre for Physics, Budapest, Hungary^5

Helmholtz-Zentrum für Materialien und Energie, Berlin, Germany^6

Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, Russia^7

关键词: Antiferromagnetics;    Easy axis;    Magnetic characterization;    Magnetic state;    Out-of plane;    Out-of-plane components;    Polarized neutron reflectometry;    SQUID magnetometry;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/862/1/012013/pdf
DOI  :  10.1088/1742-6596/862/1/012013

来源: IOP

【 摘 要 】

We report results of a magnetic characterization of [Cu30Ni70(6nm)/Nb(x)]20(x=1÷7nm) superlattices using Polarized Neutron Reflectometry (PNR) and SQUID magnetometry. The study has shown that the magnetic moment of the structures growths almost linearly from H = 0 to Hsat= 1.3kOe which can be interpreted as evidence of antiferromagnetic (AF) coupling of the magnetic moments in neighbouring layers. PNR, however, did not detect any in-plane AF coupling. Taking into account the out-of-plane easy axis of the Cu30Ni70layers, this may mean that only the out-of-plane components of the magnetic moments are AF coupled.