# US 2013/0154633 A1 · Electric current-spin current conversion device

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- Number: US 2013/0154633 A1
- Document ID: US20130154633A1
- Status: Published application
- Kind: A1
- Application number: 13/819,307
- Filed: 2011-05-23
- Published: 2013-06-20
- Earliest claimed: 2010-08-27
- Assignees: Riken
- Inventors: Kohei Fujiwara; Yasuhiro Fukuma; Jobu Matsuno; Yoshichika Otani; Hidenori Takagi
- Web page: https://patentgrep.com/patent/US20130154633A1

## CPC

- G01R 33/075: {Hall devices configured for spinning current measurements}
- H10D 48/385: {Devices using spin-polarised carriers}
- H10D 48/40: Devices controlled by magnetic fields
- H10N 50/20: Spin-polarised current-controlled devices (magnetoresistive devices H10N50/10)
- H10N 50/85: Materials of the active region
- H10N 52/00: Hall-effect devices (integrated devices or assemblies of multiple devices H10N59/00)
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR

## Abstract

An electric current-spin current conversion device according to the invention performs conversion between electric current and spin current utilizing the spin Hall effect or the inverse spin Hall effect of a 5d transition metal. A spin accumulation apparatus according to the invention includes a non-magnetic body in which injected spins are accumulated and an injection unit that injects spins into the non-magnetic body, wherein said injection unit comprises said electric current-spin current conversion device provided on said non-magnetic body, and an electric power source that supplies an electric current to said electric current-spin current conversion device in such a way that a spin current flowing toward said non-magnetic body is generated by the spin Hall effect.

## Claims

### Claim 1

An electric current-spin current conversion device characterized by performing conversion between electric current and spin current utilizing the spin Hall effect or the inverse spin Hall effect of a 5d transition metal oxide.

### Claim 2 (depends on 1)

An electric current-spin current conversion device according to claim 1, characterized in that said 5d transition metal oxide contains Ir.

### Claim 3 (depends on 1, 2)

A spin accumulation apparatus characterized by comprising:
a non-magnetic body in which injected spins are accumulated; and
an injection unit that injects spins into said non-magnetic body,
wherein said injection unit comprises an electric current-spin current conversion device according to claim 1 or 2 provided on said non-magnetic body, and an electric power source that supplies an electric current to said electric current-spin current conversion device in such a way that a spin current flowing toward said non-magnetic body is generated by the spin Hall effect.

### Claim 4 (depends on 1, 2)

A spin accumulation amount measuring apparatus characterized by comprising:
a non-magnetic body in which injected spins are accumulated;
an injection unit that injects spins into said non-magnetic body, and
a measuring unit that measures the amount of spins accumulated in said non-magnetic body,
wherein said measuring unit comprises an electric current-spin current conversion device according to claim 1 or 2 provided on said non-magnetic body, and a sensor that measures, as the amount of spins, electric current generated by the inverse spin Hall effect of the electric current-spin current conversion device.

### Claim 5 (depends on 1, 2)

A high frequency spin wave generating apparatus characterized by comprising:
an electric current-spin current conversion device according to claim 1 or 2;
a magnetic body provided on said electric current-spin current conversion device; and
an electric power source that supplies an electric current to said electric current-spin current conversion device in such a way that a spin current flowing toward said magnetic body is generated by the spin Hall effect.

### Claim 6 (depends on 1, 2)

A spin wave detection apparatus characterized by comprising:
a magnetic body;
a supply unit that supplies energy for generating a spin wave in said magnetic body; and
a detection unit that detects the spin wave generated in said magnetic body;
wherein said detection unit comprises an electric current-spin current conversion device according to claim 1 or 2 provided on said magnetic body, and a sensor that detects, as said spin wave, electric current generated by the inverse spin Hall effect of the electric current-spin current conversion device.