Method for making an ordered magnetic alloy
First Claim
1. A method for making an ordered magnetic alloy, comprising:
- (a) providing a thermally conductive base having opposite first and second surfaces;
(b) forming a thermal barrier layer on the first surface of the thermally conductive base;
(c) forming a disordered magnetic alloy layer on the thermal barrier layer, the disordered magnetic alloy layer being made from a disordered alloy which contains a first metal selected from Fe, Co, and Ni, and a second metal selected from Pt and Pd; and
(d) after step (c), applying a transient heat to the thermally conductive base to cause rapid thermal expansion of the thermally conductive base, which, in turn, causes generation of an in-plane tensile stress in the disordered magnetic alloy layer to thereby order the disordered magnetic alloy layer,wherein the application of the transient heat in step (d) is conducted by heating the thermally conductive base from an initial temperature to a phase-changing temperature Ta at a heating rate ranging from 20 to 50°
C./sec, such that 0.13Tm<
Ta<
0.35Tm, where Tm is the melting point of the disordered alloy, andwherein the application of the transient heat in step (d) is conducted by heating the second surface of the thermally conductive base with a light source having a wavelength ranging from 400 nm to 1100 nm.
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Abstract
A method for making an ordered magnetic alloy includes (a) providing a thermally conductive base having opposite first and second surfaces; (b) forming a thermal barrier layer on the first surface of the thermally conductive base; (c) forming a disordered magnetic alloy layer on the thermal barrier layer, the disordered magnetic alloy layer being made from a disordered alloy which contains a first metal selected from Fe, Co, and Ni, and a second metal selected from Pt and Pd; and (d) after step (c), applying a transient heat to the thermally conductive base to cause rapid thermal expansion of the thermally conductive base, which, in turn, causes generation of an in-plane tensile stress in the disordered magnetic alloy layer.
1 Citation
7 Claims
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1. A method for making an ordered magnetic alloy, comprising:
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(a) providing a thermally conductive base having opposite first and second surfaces; (b) forming a thermal barrier layer on the first surface of the thermally conductive base; (c) forming a disordered magnetic alloy layer on the thermal barrier layer, the disordered magnetic alloy layer being made from a disordered alloy which contains a first metal selected from Fe, Co, and Ni, and a second metal selected from Pt and Pd; and (d) after step (c), applying a transient heat to the thermally conductive base to cause rapid thermal expansion of the thermally conductive base, which, in turn, causes generation of an in-plane tensile stress in the disordered magnetic alloy layer to thereby order the disordered magnetic alloy layer, wherein the application of the transient heat in step (d) is conducted by heating the thermally conductive base from an initial temperature to a phase-changing temperature Ta at a heating rate ranging from 20 to 50°
C./sec, such that 0.13Tm<
Ta<
0.35Tm, where Tm is the melting point of the disordered alloy, andwherein the application of the transient heat in step (d) is conducted by heating the second surface of the thermally conductive base with a light source having a wavelength ranging from 400 nm to 1100 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification