Study of instability in TuMR head | |
| Author | Thanachai Siriudomlert |
| Call Number | AIT Thesis no.ME-09-10 |
| Subject(s) | Magnetoresistance Magnetic materials |
| Note | A thesis submitted in partial fulfillment of the requirements for the Degree of Master of Engineering in Microelectronics, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ME-09-10 |
| Abstract | In today digital world, huge data storage, small form factor and cheap price is required. It means that capacity of the hard disk drive have to increase while the size is shirking and cheaper price. This scenario can be achieved only by increase areal density of hard disk drive and one crucial component in hard disk drive that contributes to high area density is magnetic read head. Current magnetic read head base on spin dependent tunneling of the electron through thin tunnel barrier. This type of magnetic read head calls tunneling magnetoresistance head (TuMR). Because of extremely small size of magnetic read head, so, read head is susceptible to instability and degradation. The goal of this study is to understand TuMR instability and its origin which is the important key to improve performance of TuMR. It was found that low coercivity hard bias and mechanical defects in TuMR layers can generate abnormal high noise. Unfortunately, root cause of instability due to domain fluctuation in TuMR layers cannot be found. It was suggested that study of material composition, crystallography, atomic layer spacing and magnetic domains of TuMR layers probably reveals root cause of magnetic instability. |
| Year | 2009 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ME-09-10 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Microelectronics (ME) |
| Chairperson(s) | Bargmann, Brent |
| Examination Committee(s) | Lertsak Lekawat;Chanchana Thanachayanon |
| Scholarship Donor(s) | Western Digital (Thailand) Co.,Ltd.; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2009 |