The effect of pH changes on the giant magnetoresistance of electrodeposited superlattices

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1837816· OSTI ID:533116

Alper, M; Schwarzacher, W; Lane, S J ^[1]

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1. Univ. of Bristol (United Kingdom)

The authors have studied the effect of electrolyte pH on the giant magnetoresistance in Co-Ni-Cu/Cu superlattices prepared by electrodeposition. Films grown at low pH (1.8 {+-} 0.1) exhibited either predominantly anisotropic magnetoresistance (AMR) or much smaller GMR than possible at low pH. Also, the films grown at low pH were found to have a higher magnetization than those grown at high pH. The different magnetic and magnetotransport properties observed for different values of the electrolyte pH are accompanied by changes in the shapes of the current transients recorded during film growth and by changes in the composition of the superlattices. A possible explanation of these results is that reducing the electrolyte pH leads to a more abrupt interface between the ferromagnetic and nonmagnetic layers by suppressing Co dissolution.

• Sponsoring Organization: USDOE
• OSTI ID: 533116
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 7 Vol. 144; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT ALLOYS
COPPER ALLOYS
ELECTRODEPOSITED COATINGS
MAGNETORESISTANCE
NICKEL ALLOYS
PH VALUE
SUPERLATTICES