Two Tone Analysis of Magnesium Oxide Based Magnetic Tunnel Junctions | [Quaid-e-Awam University Research Journal of Engineering, Science and Technology • 2020]

Author(s):

1. Ahsin Murtaza Bughio: Department of Electronic Engineering,QUEST, Nawabsah,Pakistan

2. Ehsan Ali Buriro: Department of Electronic Engineering,QUEST, Nawabsah,Pakistan

3. Muhammad Adil Ansari: Department of Electronic Engineering,QUEST Campus, Larkana,Pakistan

4. Nasreen Nizamani: Department of Electronic Engineering,QUEST, Nawabsah,Pakistan

5. Shahid Hussain Siyal: Department of Energy & Environment, QUEST,Nawabsah,Pakistan

Abstract:

The magnetic tunnel junction based on magnesium oxide is a device consisting of two ferromagnetic layers separated by the insulating layer of magnesium oxide which has proved to be the foundation of contemporary magnetic read sensors in hard disk drives (HDD). This paper sheds light on the usage of Two-Tone Testing method for the complete treatment of the non-linear impact of sensors related to dynamic ones which is not possible with conventional linear as well as one-tone measurement techniques. Two-tone technique is considered novel, but is challenging in the area of magnetic materials and magnetism because of the device's nature. However, the experimental results demonstrate the usage of “Two-Tone Testing” to characterize the non-linear properties of a magnetic sensor. Addressing non-linear properties of a magnetic sensor helps proper design of magnetic sensors before the production, thereby signifying the importance of this approach.

Page(s): 133-137

DOI: 10.52584/QRJ.1802.19

Published: Journal: Quaid-e-Awam University Research Journal of Engineering, Science and Technology, Volume: 18, Issue: 2, Year: 2020

Keywords:

Nonlinear Dynamical Structures , Testing Techniques , FerroMagnetic Resonance FMR , TwoTone Testing , Magnetic Tunnel Junction MTJ

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