Tuning coercive force by adjusting electric potential in solution processed Co/Pt(111) and the mechanism involved.

Abstract:

:A combination of a solution process and the control of the electric potential for magnetism represents a new approach to operating spintronic devices with a highly controlled efficiency and lower power consumption with reduced production cost. As a paradigmatic example, we investigated Co/Pt(111) in the Bloch-wall regime. The depression in coercive force was detected by applying a negative electric potential in an electrolytic solution. The reversible control of coercive force by varying the electric potential within few hundred millivolts is demonstrated. By changing the electric potential in ferromagnetic layers with smaller thicknesses, the efficiency for controlling the tunable coercive force becomes higher. Assuming that the pinning domains are independent of the applied electric potential, an electric potential tuning-magnetic anisotropy energy model was derived and provided insights into our knowledge of the relation between the electric potential tuning coercive force and the thickness of the ferromagnetic layer. Based on the fact that the coercive force can be tuned by changing the electric potential using a solution process, we developed a novel concept of electric-potential-tuned magnetic recording, resulting in a stable recording media with a high degree of writing ability.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Chang CH,Kuo WH,Chang YC,Tsay JS,Yau SL

doi

10.1038/srep43700

subject

Has Abstract

pub_date

2017-03-03 00:00:00

pages

43700

issn

2045-2322

pii

srep43700

journal_volume

7

pub_type

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