Exchange coupled amorphous ribbons for electronic stripes

• US 10,108,891 B1
• Filed: 03/14/2015
• Issued: 10/23/2018
• Est. Priority Date: 03/21/2014
• Status: Active Grant

• Current Assignee: Dynamics Inc.
• Original Assignee: Dynamics Inc.
• Inventors: Yu, Jun, Workley, James H.
• Primary Examiner(s): Marshall, Christie I
• Application Number:
  US14/658,184
• Time in Patent Office: 1,319 Days
• Field of Search: None
• CPC Class Codes: G06K 19/06206 the magnetic marking being emulated

Abstract

Dynamic magnetic stripe communications devices may include a coil. An exchange coupled amorphous material may be inside the coil, for example, in the form of a ribbon. The exchange coupled amorphous material may include magnetically hard crystallites embedded in a soft magnetic amorphous matrix and/or at least one crystalline surface layer. A device may include a dynamic magnetic stripe communications device including one or more exchange coupled amorphous ribbons. The device may include more than one exchange coupled amorphous ribbon. Amorphous ribbons and/or layers of amorphous ribbons may be stacked (e.g., in alignment to one another) and/or offset at different heights. The ribbons may be in a single domain state without an external magnetic field, for example, an external magnetic field from a permanent magnet. The device may not include a permanent magnet.

Claims

1. A device, comprising:

a dynamic magnetic stripe communications device including at least one coil and an exchange biased core including an exchange coupled amorphous material.

2. The device of claim 1, further comprising a display.

3. The device of claim 1, further comprising a read-head detector.

4. The device of claim 1, further comprising a button.

5. The device of claim 1, further comprising a light emitting diode.

6. The device of claim 1, wherein the exchange coupled amorphous material includes magnetically hard crystallites embedded in a soft magnetic amorphous matrix.

7. The device of claim 1, wherein the exchange coupled amorphous material includes at least one crystalline surface layer.

8. The device of claim 1, wherein the core includes a first exchange coupled ribbon and a second exchange coupled ribbon, and

the first ribbon includes the exchange coupled amorphous material.

9. The device of claim 1, wherein the exchange coupled amorphous material is a soft magnetic material.

10. The device of claim 1, wherein the exchange coupled amorphous material is at least part of a material ribbon, and

the core includes a layer of material ribbons.

11. The device of claim 1, wherein the exchange coupled amorphous material is at least part of a material ribbon, and

the device includes a plurality of stacked ribbons.

13. The device of claim 1, wherein the at least one exchange coupled amorphous material is anisotropic, and

the anisotropy is unidirectional.

14. The device of claim 1, wherein the core includes a first exchange coupled ribbon and a second exchange coupled ribbon,

the first ribbon includes the exchange coupled amorphous material, and

the first and second ribbons are each in a single domain state.

15. The device of claim 1, wherein the core includes a first exchange coupled ribbon and a second exchange coupled ribbon,

the first ribbon includes the exchange coupled amorphous material, and

the first and second ribbons are each in a same single domain state.

16. The device of claim 1, wherein the exchange bias of the core is a bias field internal to the exchange coupled amorphous material.

17. The device of claim 1, wherein the core includes a first exchange coupled ribbon and a second exchange coupled ribbon,

the first ribbon includes the exchange coupled amorphous material, and

the exchange bias of the core includes a bias field internal to the first and second ribbons.

18. The device of claim 1, wherein the core includes a first exchange coupled ribbon and a second exchange coupled ribbon,

the first ribbon includes the exchange coupled amorphous material,

the exchange bias of the core includes a bias field internal to the first and second ribbons, and

the first and second ribbons are exchange coupled.

12. A mobile device, comprising:

a dynamic magnetic stripe communications device including a coil and at least one exchange coupled amorphous ribbon, the ribbon within the coil,

wherein the at least one ribbon includes a material with a preferred orientation of magnetization, and

the dynamic magnetic stripe does not include a bias component for providing a magnetic field to the at least one ribbon in the direction of the preferred orientation.