MAGNETIC PROPERTIES AND DOMAIN STRUCTURE OF CoFeB/Pd MULTILAYERS WITH PERPENDICULAR MAGNETIC ANISOTROPY

2019 ◽  
Vol 57 (6) ◽  
pp. 685
Author(s):  
Duy-Truong Quach
Keyword(s):  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Domain Structure ◽  
Kerr Effect ◽  
Magnetic Hysteresis ◽  
Hysteresis Loops ◽  
Perpendicular Magnetic Anisotropy ◽  
Domain Structures ◽  
Vibration Sample Magnetometer ◽  
Magneto Optical Kerr Effect

The magnetic properties and domain structure of (CoFeB/Pd)n (n = 2 – 10) multilayers with perpendicular magnetic anisotropy have been investigated systematically. The study has been carried out by using vibration sample magnetometer (VSM) and magneto-optical Kerr effect (MOKE) microscope. The results show clear changes of magnetic hysteresis and domain structure when increasing the number of bilayer (n) from 2 to 10. With increasing the number of bilayer, the multilayers’ hysteresis loops change from square-shaped to slanted, while domain structures change from circular-like to maze.

Magnetic Domain Structures in CoNiFe Thin Films and Lines

2002 ◽  
Vol 738 ◽  
Author(s):  
Lucas Pérez ◽  
Oscar de Abril ◽  
Claudio Aroca ◽  
Pedro Sánchez ◽  
Eloísa López ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
Thin Films ◽  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Domain Structure ◽  
Magnetic Domain ◽  
Electrodeposition Process ◽  
Domain Structures

ABSTRACTThin films and arrays of lines of magnetic CoNiFe alloy have been produced by electrodeposition. A magnetic field was applied during the electrodeposition process in order to induce a magnetic anisotropy in the sample. The dependence of the magnetic properties and the magnetic domain structures on the thickness of the films is reported. In addition to this, the magnetic properties and the domain structure of a thin film and an array of lines, with the same thickness and deposited in the same conditions, have been compared. An increase in the coercivity of the array of lines has been shown.

scholarly journals Magneto‐optical Kerr effect and perpendicular magnetic anisotropy of evaporated and sputtered Co/Pt multilayer structures

1991 ◽  
Vol 69 (7) ◽  
pp. 4021-4028 ◽  
Author(s):  
Ping He ◽  
William A. McGahan ◽  
John A. Woollam ◽  
F. Sequeda ◽  
T. McDaniel ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Kerr Effect ◽  
Perpendicular Magnetic Anisotropy ◽  
Multilayer Structures ◽  
Optical Kerr Effect ◽  
Magneto Optical Kerr Effect

scholarly journals Asymmetric Hysteresis Loops in Co Thin Films

2020 ◽  
Vol 5 (4) ◽  
pp. 71
Author(s):  
Andrea Ehrmann ◽  
Tomasz Blachowicz
Keyword(s):  
Exchange Bias ◽  
Kerr Effect ◽  
Room Temperature ◽  
Magnetic Hysteresis ◽  
Hysteresis Loops ◽  
Blocking Temperature ◽  
Optical Kerr Effect ◽  
Thin Film System ◽  
Magnetic Hysteresis Loops ◽  
Magneto Optical Kerr Effect

Asymmetric magnetic hysteresis loops are usually found in exchange bias (EB) systems, typically after field cooling a system below the Néel temperature of an antiferromagnet exchange coupled to a ferromagnet. Alternatively, asymmetric hysteresis loops may occur due to undetected minor loops or in systems with a rotational anisotropy. Here, we report on an exchange bias thin film system MgO(100)/Co/CoO, examined at room temperature, which is far above the blocking temperature, by the magneto-optical Kerr effect (MOKE). While the longitudinal hysteresis loops partly show steps which are well-known from diverse purely ferromagnetic systems, the transverse hysteresis loops exhibit clear asymmetries, similar to exchange biased systems at low temperatures, and unusual transverse magnetization values at saturation. Since minor loops and a rotational anisotropy can be excluded in this case, this asymmetry can possibly be a residue of the exchange bias coupling at lower temperatures.

scholarly journals Domain Structure and Reversal Mechanisms through Diffracted Magneto-optics in Fe80B20 Microsquare Arrays

2020 ◽  
Vol 6 (4) ◽  
pp. 50
Author(s):  
Ruben Álvarez-Sánchez ◽  
Jose Miguel García-Martín ◽  
Fernando Briones ◽  
José Luis Costa-Krämer
Keyword(s):  
Domain Structure ◽  
Kerr Effect ◽  
Magnetic Force ◽  
Predictive Power ◽  
Diffraction Theory ◽  
Force Microscopy ◽  
Domain Structures ◽  
Magnetic Elements ◽  
Distribution Moments ◽  
Magneto Optical Kerr Effect

In this paper, the predictive power of diffracxtive magneto-optics concerning domain structure and reversal mechanisms in ordered arrays of magnetic elements is demonstrated. A simple theoretical model based on Fraunhoffer diffraction theory is used to predict the magnetisation reversal mechanisms in an array of magnetic elements. Different domain structures and simplified models (or educated guesses) of the associated reversal mechanisms produce marked differences in the spatial distributions of the magnetisation. These differences and the associated magnetisation distribution moments are experimentally accessible through conventional and diffractive magneto-optical Kerr effect measurements. The domain and magnetisation reversal predictions are corroborated with Magnetic Force Microscopy (MFM) measurements.

Sign in / Sign up

Export Citation Format

Share Document