Detection of magnetic moment in thin films with a home-made vibrating sample magnetometer

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:456

Article

Jordan, D.^1,4  Gonzalez-Chavez, D.^1,2  Laura, D.¹  Leon Hilario, L. M.¹  Monteblanco, E.^1,3  Gutarra, A.¹  Aviles-Felix, L.^1,4 

[1] Univ Nacl Ingn, Fac Ciencias, Lab Mat Nanoestruct, Ave Tupac Amaru 210, Lima 025, Peru

[2] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, RJ, Brazil

[3] Univ Lorraine, Inst Jean Lamour, Dept Nanomagnetisme & Elect Spin P2M, Blvd Aiguillettes, Nancy, France

[4] Inst Balseiro, Ctr Atom Bariloche, Ave Ezequiel Bustillo 9500, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

关键词: Vibrating sample magnetometer;    Magnetometry;    Principle of reciprocity;    Sensitivity function;    Magnetic thin films;   

DOI  :  10.1016/j.jmmm.2018.01.088

来源: Elsevier

【 摘 要 】

This paper explores the optimization of an array of pick-up coils in a home-made vibrating sample magnetometer for the detection of magnetic moment in thin films. Sensitivity function of a 4-coils Mallinson configuration was numerically studied for the determination of the physical dimensions that enhance the sensitivity of the magnetometer. By performing numerical simulations using the Biot-Savart law combined with the principle of reciprocity we were able to determine the maximum values of sensitivity and the influence of the separation of the coils on the sensitivity function. After the optimization of the pick-up coils, the vibrating sample magnetometer was able to detect the magnetic moment of a 100 nm-thickness Fe19Ni81 magnetic thin film along and perpendicular to the in-plane anisotropy easy axis. The implemented vibrating sample magnetometer is able to detect changes in the magnetic moment of similar to 2 x 10(-4) emu. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

Free