Multi-iron-heterogeneous magnetic field sensor adjustable in measuring range and measuring range adjusting method
A magnetic field sensor and variable adjustment technology, applied in the field of magnetic field sensors, can solve problems such as the inability of magnetic field sensors, and achieve the effects of ensuring accuracy, simple structure, and expanding the magnetic field measurement range.
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Embodiment 1
[0034] Such as figure 1 As shown, a multi-iron heterogeneous magnetic field sensor with adjustable range of the present invention includes a bottom metal electrode layer 1, a free layer 2, an isolation layer 3, a pinning layer 4, and a top metal electrode layer 5 arranged in sequence from bottom to top; The free layer 2 is a multi-iron heterogeneous multilayer structure, from bottom to top, there are ferroelectric layer 21 and the first ferromagnetic layer 22; the pinning layer 4 is a multilayer structure, from bottom to top, there are the second ferromagnetic layer 41 and Antiferromagnetic layer 42; the direction of the ferroelectric stress axis of the free layer 2 is perpendicular to the direction of the magnetic moment of the pinned layer 4 in the horizontal projection. In this embodiment, the ferroelectric stress axis direction of the free layer 2 is the horizontal direction of the paper surface, the magnetic moment direction of the pinned layer 4 is perpendicular to the pa...
Embodiment 2
[0065] Such as figure 2 As shown, the multiferro heterogeneous magnetic field sensor with adjustable range in this embodiment is basically the same as that of Embodiment 1, except that the ferroelectric layer 21 is a thin film structure of ferroelectric material, or a thin film structure of piezoelectric material, or Multi-ferro material film structure; there is a support layer 6 below the bottom metal electrode layer 1, which is used to support the layers of the magnetic field sensor. The range adjustment method of the multi-iron heterogeneous magnetic field sensor of this embodiment is the same as that of the first embodiment.
Embodiment 3
[0067] Such as image 3 As shown, the multi-ferro heterogeneous magnetic field sensor with adjustable range in this embodiment is basically the same as that in Embodiment 2, except that the ferroelectric layer 21 is a thin film structure of ferroelectric material, or a thin film structure of piezoelectric material, or Multi-ferro material film structure; there is a support layer 6 above the top metal electrode layer 5, which is used to support the layers of the magnetic field sensor. The range adjustment method of the multi-iron heterogeneous magnetic field sensor of this embodiment is the same as that of the first embodiment.
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