Microscopic investigation of the magnetic saturation process for Co/Pt multilayers

• Published in: Journal of the Korean Physical Society Vol. 69; no. 1; pp. 72 - 74
• Main Authors: Quach, Duy-Truong, Kim, Dong-Hyun, Lee, Kyung-Min, Jeong, Jong-Ryul, Pham, Duc-Thang
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Physical Society 01-07-2016; Springer Nature B.V; 한국물리학회
• Subjects: Cobalt; Magnetic anisotropy; Magnetic fields; Magnetic saturation; Magnetism; Mathematical and Computational Physics; Multilayers; Particle and Nuclear Physics; Physics; Physics and Astronomy; Theoretical; 물리학; Hysteresis curve; Saturation field; Magnetic domain
• ISSN: 0374-4884; 1976-8524
• DOI: 10.3938/jkps.69.72

We have systematically investigated the magnetic saturation process for Co/Pt multilayers with perpendicular magnetic anisotropy by using the first-order reversal-curve (FORC) technique. We find that even for a field that apparently is higher than the major-loop saturation field, some microscopically not-yet-annihilated domains still remain. The true saturation on a microscopic scale field is found to be about 1.5 to 2.5 times greater than the macroscopicall-determined majorloop saturation field. Not-yet-annihilated domains are observed to be exponentially reduced with respect to the applied magnetic field.