8-10 June 2016
Asia/Bangkok timezone

Magnetic Track Width Modeling

Jun 9, 2016, 2:45 PM
15m
Room Anek

Room Anek

Oral presentaion Magnetic and Semiconductor Physics Session XXVIII

Speaker

Dr Sujin Suwanna (Department of Physics, Faculty of Science, Mahidol University, Phayathai, Bangkok)

Description

We perform lapping experiments on magnetic readers’ and writers’ heads to determine the relationship between the magnetic track width and the electrical lapping guides, used as sensors to control the writer’s and reader’s lapping process. The experimental results are used to construct the model calibration curve and calculate the magnetic track width sensitivity function, defined as the rate of the change of the magnetic track width with respect to the writer’s height. First-principle calculations of this relationship and the magnetic track width sensitivity are also carried out with the Landau-Lifshitz-Gilbert equation using the Object Oriented Micro-Magnetic Framework (OOMMF) software. The modeling from both approaches yields consistent results, and shows that the magnetic track width sensitivity obeys a power-law relation. Consequently, we are able to investigate, predict and compensate the magnetic track width in a lapping process with reasonable accuracy.

Primary author

Dr Sujin Suwanna (Department of Physics, Faculty of Science, Mahidol University, Phayathai, Bangkok)

Co-authors

Mr Chakkrit Supavasuthi (Western Digital (Thailand), Co. Ltd., Bang Pa-in, Phra Nakhon Si Ayutthaya) Mr Ittipon Cheowanish (Western Digital (Thailand), Co. Ltd., Bang Pa-in, Phra Nakhon Si Ayutthaya) Mr Ruchipas Bavontaweepanya (Department of Physics, Faculty of Science, Mahidol University, Phayathai, Bangkok) Mr Satit Thepprathankit (Department of Statistics, Faculty of Science, Kasetsart University, Ladyaow Chatuchak, Bangkok) Mr Theera Yaemglin (Western Digital (Thailand), Co. Ltd., Bang Pa-in, Phra Nakhon Si Ayutthaya; Institute of FIeld Robotics, King Mongkut's University of Technology Thonburi Bangkok)

Presentation materials

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