Magnetic sensor including magnetic layer of closed loop shape
First Claim
1. A magnetic sensor, comprising:
- a first magnetic layer in a shape of a closed loop;
a pair of current terminals which face each other contacting with the first magnetic layer and through which current is input and output;
a pair of voltage terminals which face each other contacting with the first magnetic layer and from which output voltage is detected; and
a second magnetic layer disposed inside the closed loop, wherein the second magnetic layer is made of a same material as the first magnetic layer, wherein the second magnetic layer is separated from the first magnetic layer, the current terminals, and the voltage terminals, and wherein the second magnetic layer is concentric with the first magnetic layer and is spaced by a predetermined distance from the first magnetic layer.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a magnetic sensor for detecting a magnetic field. The magnetic sensor includes a magnetic layer of a closed loop shape; a pair of current terminals which face each other contacting with the closed loop and through which current is input/output; and a pair of voltage terminals which face each other contacting with the closed loop and from which output voltage is detected. Both an anisotropic magnetoresistance effect (AME) and a planar Hall effect (PHE) contribute to the output voltage and a hysteresis of the output voltage is eliminated by exchange coupling of a ferromagnetic layer by a ferromagnetic-antiferromagnetic layer structure and a ferromagnetic-metal-antiferromagnetic layer structure. Accordingly, it is possible to minimize a hysteresis due to a demagnetization factor of the closed loop, stabilize the output voltage of the magnetic sensor and enhance sensitivity.
7 Citations
13 Claims
-
1. A magnetic sensor, comprising:
-
a first magnetic layer in a shape of a closed loop; a pair of current terminals which face each other contacting with the first magnetic layer and through which current is input and output; a pair of voltage terminals which face each other contacting with the first magnetic layer and from which output voltage is detected; and a second magnetic layer disposed inside the closed loop, wherein the second magnetic layer is made of a same material as the first magnetic layer, wherein the second magnetic layer is separated from the first magnetic layer, the current terminals, and the voltage terminals, and wherein the second magnetic layer is concentric with the first magnetic layer and is spaced by a predetermined distance from the first magnetic layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13)
-
-
12. A magnetic sensor comprising:
-
a first magnetic layer in a shape of a closed loop; a pair of current terminals which face each other contacting with the first magnetic layer and through which current is input or output; a pair of voltage terminals which face each other contacting with the first magnetic layer and from which output voltage is detected; and a second magnetic layer disposed outside the closed loop, wherein the second magnetic layer is made of a same material as the first magnetic layer, wherein the second magnetic layer is separated from the first magnetic layer, the current terminals, and the voltage terminals, and wherein the second magnetic layer is spaced by a predetermined distance from the first magnetic layer.
-
Specification