Oscillators and methods of operating the same
AssigneeSamsung Electronics Co., Ltd.
InventorsSung-chul Lee, Sun-ae Seo, Young-jin Cho, Ung-hwan Pi, Kwang-seok Kim, Ji-young Bae
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Abstract
An oscillator includes: a plurality of free layers and a non-magnetic layer disposed between the plurality of free layers. Each of the plurality of free layers has perpendicular magnetic anisotropy or in-plane magnetic anisotropy. Magnetization directions of the free layers are periodically switched such that a signal within a given frequency band oscillates.
Claims15
An oscillator comprising:
- a first free layer;
- a first non-magnetic layer disposed on the first free layer;
- and
- a second free layer disposed on the first non-magnetic layer, the second free layer corresponding to the first free layer;
- wherein
- the oscillator is configured to generate a frequency signal by using direct current (DC) applied to the oscillator,
- magnetization directions of the first and second free layers are configured to periodically repeat with a time interval by the direct current (DC), and
- a parallel state and an anti-parallel state of the magnetization directions periodically repeat.
An oscillator comprising:
- a first free layer;
- a first non-magnetic layer disposed on the first free layer;
- and
- a second free layer disposed on the first non-magnetic layer, the second free layer corresponding to the first free layer;
- wherein
- the first free layer and the second free layer have the same thickness.
An oscillator comprising:
- a first free layer;
- a first non-magnetic layer disposed on the first free layer;
- a second free layer disposed on the first non-magnetic layer, the second free layer corresponding to the first free layer;
- a second non-magnetic layer stacked on the second free layer;
- and
- a third free layer stacked on the second non-magnetic layer.
An oscillator comprising:
- a first free layer;
- a first non-magnetic layer disposed on the first free layer;
- and
- a second free layer disposed on the first non-magnetic layer, the second free layer corresponding to the first free layer;
- wherein
- at least one of the first free layer and the second free layer has a multi-layer structure.
A method of operating an oscillator, the method comprising:
- applying a direct current (DC) to the oscillator to generate a frequency signal, the oscillator including a first free layer, a first non-magnetic layer disposed on the first free layer, and a second free layer disposed on the first non-magnetic layer, the second free layer corresponding to the first free layer;
- and
- detecting a change in a resistance of the oscillator;
- wherein
- magnetization directions of the first and second free layers periodically repeat with a time interval by the direct current (DC), and
- a parallel state and an anti-parallel state of the magnetization directions periodically repeat.
A method of operating an oscillator, the method comprising:
- applying a current to the oscillator, the oscillator including a first free layer, a first non-magnetic layer disposed on the first free layer, and a second free layer disposed on the first non-magnetic layer, the second free layer corresponding to the first free layer;
- and
- detecting a change in a resistance of the oscillator;
- wherein
- a second non-magnetic layer is disposed on the second free layer and a third free layer is disposed on the second non-magnetic layer.
Dependencies are inferred from the claim text.