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Clusters of interacting single domain Co nanomagnets for multistate perpendicular magnetic media applications
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10.1063/1.2839603
/content/aip/journal/jap/103/7/10.1063/1.2839603
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/7/10.1063/1.2839603
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Figures

Image of FIG. 1.
FIG. 1.

Schematic illustration of high resolution EBL on suspended SiN membrane used in these experiments. (a) Definition of the back side SiN opening by chemical∕mechanical etching. (b) Removal of the silicon bulk via wet chemical etching. (c) EBL on suspended SiN membrane, in which (i) silicon nitride coating. (ii) Silicon wafer with (1 0 0) surface orientation. (iii) EBL working layer, electron beam resist only, or resist with metallic underlayer. (iv) Incident focused electron beam. (v) Transmitted electron beam. (vi) Array of patterns created by electron beam point exposure.

Image of FIG. 2.
FIG. 2.

AFM images of cluster structures fabricated by ultrahigh resolution EBL and evaporation. All nanodots are evaporated to height and separated to the nearest neighbor(s). (a) Three Ag nanodots in a triangle cluster. (b) Four Ag nanodots in a quadrilateral cluster. (c) Six Ag nanodots in a triangle cluster. (d) Seven Ag nanodots in a hexagonal cluster.

Image of FIG. 3.
FIG. 3.

Magnetic switching process resulting in four stable remanent magnetic states with distinct total perpendicular magnetization. (a) AFM topography of the cluster of three Co nanomagets fabricated by PRECD. (b) Schematic magnetic switching curve of the three-dot cluster showing the four distinct states. MFM images of the four magnetic static states in (c) remanent state with all nanomagnets pointing down, total . (d) One of the nanomagnets pointing up, total . (e) Two of the nanomagnets pointing up, total . (f) All nanomagnets pointing up, total . (g) AFM and MFM images of the mixed remanent states of the clusters after applying field during the switching experiment.

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/content/aip/journal/jap/103/7/10.1063/1.2839603
2008-03-21
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Clusters of interacting single domain Co nanomagnets for multistate perpendicular magnetic media applications
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/7/10.1063/1.2839603
10.1063/1.2839603
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