Magnetic Nanoparticle Detection Using Wheatstone Bridge Giant Magnetoresistance (GMR) Sensor with Double CoFeB Spin-Valve Thin Films
| Autor: | Taufikuddin Alfansuri, Edi Suharyadi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Gmr sensor Materials science Wheatstone bridge business.industry Mechanical Engineering Spin valve Nanoparticle Giant magnetoresistance 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences law.invention Mechanics of Materials law 0103 physical sciences Optoelectronics General Materials Science Thin film 0210 nano-technology business |
| Zdroj: | Key Engineering Materials. 884:348-352 |
| ISSN: | 1662-9795 |
| Popis: | The Wheatstone bridge-giant magnetoresistance (GMR) sensor with single and double spin valve thin film was successfully developed for potential biomolecular detection. The GMR sensor with spin valves structure of [Ta (2nm)/IrMn (10nm)/CoFe (3nm)/Cu (2,2nm)/CoFeB (10nm)/Ta (5nm)] was fabricated using DC Magnetic Sputtering method. The Fe3O4magnetic nanoparticles were synthesized by the co-precipitation method as a magnetic label. The magnetic properties of the Fe3O4nanoparticles measured are the saturation magnetization (Ms) of 77.7 emu/g, remanence magnetization (Mr) of 7.7 emu/g, and coercivity (Hc) of 49 Oe. The X-ray diffraction pattern showed the inverse cubic spinel structure with an average crystal size of about 20.1 nm. Fe3O4magnetic nanoparticles with various concentrations were used to be detected using a GMR sensor. The output voltage of the GMR sensor with the single and double spin-valve increased from 1.7 to 3.9 mV and 2.9 to 5.3 mV with the increase of the Fe3O4concentration from 0 to 20 mg/mL, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|