Development of Giant Magnetoresistance Material Based on Cobalt Ferrite

• Authors: M. Djamal , Ramli , Khairurrijal , F. Haryanto
• Languages of publication: EN

Abstracts

EN

This paper describes an experimental study on development of giant magnetoresistance material based on cobalt ferrite (CoFe₂O₄). We have successfully developed a new giant magnetoresistance material based on CoFe₂O₄ i.e; sandwich (CoFe₂O₄/CuO/CoFe₂O₄), spin valve (FeMn/CoFe₂O₄/CuO/CoFe₂O₄), and organic giant magnetoresistance (CoFe₂O₄/Alq₃/CoFe₂O₄) using dc-opposed target magnetron sputtering method. Crystalline structure and morphology of thin films were characterized by X-ray diffraction and scanning electron microscope. The electrical properties were characterized using a four-point probe and magnetic properties were characterized using a vibrating sample magnetometer. In sandwich structure, the giant magnetoresistance ratio maximum are found at room temperature in CoFe₂O₄/CuO/CoFe₂O₄ thin film is 70% when CoFe₂O₄ and CuO layer thickness are 62.5 nm and 14.4 nm, respectively. The maximum of giant magnetoresistance ratio of the spin valve structure obtained is 32.5% at FeMn layer thickness of 45 nm. Meanwhile, in organic giant magnetoresistance the maximum value of the giant magnetoresistance ratio are approximately 35.5% at room temperature.

Keywords

EN

75.47.De; 81.15.Cd

Discipline

• 81.15.Cd: Deposition by sputtering
• 75.47.De: Giant magnetoresistance

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 128
• Issue: 2B
• Pages: B-19-B-22

Dates

published

2015-8

Contributors

author

M. Djamal

• Institut Teknologi Bandung, Department of Physics, Jl. Ganesa 10, Bandung, Indonesia
• Institut Teknologi Sumatera, Department of Physics, Jl. Terusan Ryacudu, Lampung Selatan, Indonesia

author

Ramli

• Universitas Negeri Padang, Department of Physics, Jl. Prof. Hamka, Padang, Indonesia

author

Khairurrijal

• Institut Teknologi Bandung, Department of Physics, Jl. Ganesa 10, Bandung, Indonesia

author

F. Haryanto

• Institut Teknologi Bandung, Department of Physics, Jl. Ganesa 10, Bandung, Indonesia

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Identifiers

DOI

10.12693/APhysPolA.128.B-19