Magnetic measurements based on magneto-optical Kerr effect on pnictide Ba(Fe1?x Cox)2As2/Fe thin film

11th European Conference on Applied Superconductivity

Valentino, M.^1,2,3 ; Bonavolontà, C.^1,2 ; Porto, C.^2 ; Delisio, C.^1,2 ; Parlato, L.^1,2 ; Pepe, G.P.^1,2 ; Iida, K.^3 ; Kurth, F.^3

CNR-SPIN Napoli, Italy^1

Department of Physics, University of Naples Federico II, Italy^2

IFW Dresden, Germany^3

关键词: First harmonic;    Hysteretic loop;    Magneto-optical;    Magneto-optical Kerr effects;    MgO substrate;    Photoelastic modulations;    Reflected laser;    Temperature dependence;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/1/012050/pdf
DOI  :  10.1088/1742-6596/507/1/012050

来源: IOP

【 摘 要 】

We present characterization of Ba(Fe1-xCox)2As2thin film using a magneto-optical Kerr effect setup based on photoelastic modulation. The magneto optical technique has been used to analyse the thickness and the temperature dependence of the magnetic properties of epitaxial Ba(Fe1-xCox)2As2/Fe thin films grown on MgO substrate. The first harmonics, of the reflected laser beam intensity from pnictide thin films is compared with a reference Fe thin film. The hysteretic loops of such samples at room temperature and at 5K are presented.