Patents
US 12716970 B2: Method to calculate performance of a magnetic element comprising a ferromagnetic layer exchange-coupled to an antiferromagnetic layer
- Granted
- 2026-08-25
- Filed
- 2022-04-04 application 18555075
- Type
- Utility · 13 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A method to calculate performance of a magnetic element including a reference bilayer including a ferromagnetic reference layer having a reference magnetization and an antiferromagnetic layer pining the reference magnetization by exchange-bias, the antiferromagnetic layer including a metallic polycrystalline material having a grain volume distribution; the method including: measuring an exchange-bias field (Hex) of the antiferromagnetic layer as a function of temperature; fitting a grain volume distribution function to the measured exchange-bias fields (Hex) to determine parameters characterizing the volume distribution function; calculating a variation in the direction of the reference magnetization as a function of a direction of an exposure magnetic field (H); and calculating the exchange bias field (Hex) for any value of the in-plane exposure field (H).
Source: PTBLXML, file of 2026-08-25 (ipgb20260825.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Allegro MicroSystems, LLC 910 patents | US company or organization | Manchester, NH | ALLEGRO MICROSYSTEMS, INC. SEC filer FUZZY low confidence: same name (legal endings aside), one of each nationally | PTBLXML, file of 2026-08-25 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Nikita Strelkov | Meylan, FR | 8 | PTBLXML, file of 2026-08-25 | |
| Andrey Timopheev | Vif, FR | 14 | PTBLXML, file of 2026-08-25 | |
| Jeffrey Childress | San Jose, CA | PTBLXML, file of 2026-08-25 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G01R | Measuring electric variables; measuring magnetic variables | G01R33/093 | PTBLXML, file of 2026-08-25 |
| H01F | Magnets; inductances; transformers; selection of materials for their magnetic properties | H01F10/3268 | PTBLXML, file of 2026-08-25 |
| H10N | Electric solid-state devices not otherwise provided for | H10N50/10 | PTBLXML, file of 2026-08-25 |
| G11C | Static stores | G11C11/161 | PTBLXML, file of 2026-08-25 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
No recorded assignments or security interests on file for this patent.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.