Field and current-induced magnetization reversal studied through spatially resolved point-contacts

Autor:	Erik Wahlström, Rimantas Brucas, Dezheng Yang, Maj Hanson, Magne Saxegaard
Rok vydání:	2010
Předmět:	Materials science Magnetic domain Field (physics) Condensed matter physics Magnetoresistance law Oersted General Physics and Astronomy Giant magnetoresistance Scanning tunneling microscope Layer (electronics) Magnetic field law.invention
Zdroj:	Journal of Applied Physics. 107:103909
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.3407539
Popis:	We present results from scanning tunneling microscopy based point-contact measurements of the local resistance in octagon shaped, Co(20 nm)/Cu (5 nm)/Fe(19)Ni(81)(2.5 nm) spin-valve rings. Through this technique one can detect the magnetoresistance with spatial resolution, and link it to magnetic domain wall motion within the ring. Measurements with varying currents indicate current-induced effects leading to offsets in the magnetic fields required for magnetic switching. The offsets can be attributed to current-induced spin-transfer torque effects for the thin Fe(19)Ni(81) layer and to Oersted field effects for the thick Co layer.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::afdafd47c0124b91e581202509ed5b0f https://doi.org/10.1063/1.3407539 Zobrazit plný text záznamu