Abstract
In the work the strain effect in magneto-optical (magneto-optical Kerr effect - MOKE) and magnetic properties of thin films and multilayers based on Fe and Pt in unstrained and strained states was studied. The proposed ratio for strain coefficient of MOKE us quantitative characteric this effect. By measuring the Kerr angle for different values of strain and geometry measurements, it is concluded the influence of strain effects on magnetic characteristics of two-layer films and multilayers.
Highlights
Effectiveness of nanodimentional thin film materials as sensitive elements of temperature, pressure, strain, magnetic field and others sensors possible to develop a concept of multi-sensors, including sensors, strain and magnetic field, the principle of the latter may be based on magneto-strain effect
As in the case of diamond films [9], the longitudinal and transverse strain coefficients decreased under the influence of an external magnetic field, that is connected with a change of Young's modulus under the influence of a magnetic field in metallic materials [8], and in the case of diamond films - changing the width of the energy gap [9]
Film samples based on Fe and Pt were prepared by condensation of layered crucibles in ultra-high vacuum of 10-6 Pa at substrate of polystyrene and single crystal silicon with a natural layer of SiO2
Summary
Effectiveness of nanodimentional thin film materials as sensitive elements of temperature, pressure, strain, magnetic field and others sensors possible to develop a concept of multi-sensors, including sensors, strain and magnetic field, the principle of the latter may be based on magneto-strain effect.The principle of operation of these sensors is based on the strain effects of electric resistance (R) film (see, for example, [1,2,3]) or giant magnetoresistance (GMR) [4, 5]. Effectiveness of nanodimentional thin film materials as sensitive elements of temperature, pressure, strain, magnetic field and others sensors possible to develop a concept of multi-sensors, including sensors, strain and magnetic field, the principle of the latter may be based on magneto-strain effect. As a kind of strain effect can be seen magneto-strain effect when the strain coefficient measured in the presence of an external magnetic field (B). Phenomenological theory of this effect in single-films and multilayers proposed in works [6, 7] and for gained some experimental data. As in the case of diamond films [9], the longitudinal and transverse strain coefficients decreased under the influence of an external magnetic field, that is connected with a change of Young's modulus under the influence of a magnetic field in metallic materials [8], and in the case of diamond films - changing the width of the energy gap [9]
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