Spin-dependent tunneling junctions with parallel hard bias for read heads

Autor:	Dean Rao, C. Chien, Ming Mao, Kyusik Sin, Matthew R. Gibbons, Shin Funada, Hua-Ching Tong
Rok vydání:	2001
Předmět:	Materials science Condensed matter physics Field (physics) General Physics and Astronomy Biasing law.invention symbols.namesake law Magnet Shielded cable symbols Barkhausen stability criterion Layer (electronics) Barkhausen effect Quantum tunnelling
Zdroj:	Journal of Applied Physics. 89:7359-7361
ISSN:	1089-7550 0021-8979
Popis:	We investigated the feasibility of a spin-dependent tunneling (SDT) read head with a parallel hard bias. In this scheme, the longitudinal biasing to the free layer is provided by fringe fields from a hard magnet which is fabricated over or under the free layer. A linear response to the applied field is achieved for a SDT junction biased with 400 A CoCrPt underneath. Thinner CoCrPt layers yield Barkhausen jumps in the free layer. Micromagnetic simulation indicates the bias field at the edge of the free layer is smaller than that which would result from an abutted magnet. The simulation results are similar to experimental data, and indicate that shielded devices with 400 A permanent magnet will provide stable transfer curves.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a0e6edc08940c48d56e8fb63a63ff35c https://doi.org/10.1063/1.1361051 Zobrazit plný text záznamu