User Areal Density Optimization for Conventional and 2-D Detectors/Decoders

Chan, Kheong Sann; James, Ashish; Shafi'ee, Sari Shafidah; Rahardja, Susanto; Shen, Jinlu; Sivakumar, Krishnamoorthy; Belzer, Benjamin J.

doi:10.1109/tmag.2017.2747627

Cited by 10 publications

(2 citation statements)

References 23 publications

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“…This range was limited by the condition that the readers could be operated with ±30º tilt of the free layer magnetization while receiving the Hstray, so that the sensor utilization is the same for all cases. Additionally, the limitations that the RW length has to be less than the 0.95×media track width as well as the SH should not exceed 1.1×RW were included [37]. It was noticed that the length of RW was fixed while varying the length of SH and vice versa for all case studies.…”

Section: A Optimal Sizing Ot the Cpp-gmr Sensor For Ad Of 1 Tb/inmentioning

confidence: 99%

“…Then, the RW should be firstly set before estimating the SH. At a particular track width, the maximum physical RW can be determined by the RW/track width ratio of 0.95 [37], beyond this value, the signal processing performance can drop significantly. Then, we predicted that the suitable RW for the CPP-GMR read sensors should be 48 nm in this particular circumstance.…”

Section: A Optimal Sizing Ot the Cpp-gmr Sensor For Ad Of 1 Tb/inmentioning

confidence: 99%

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Optimal Sizing of CPP-GMR Read Sensors for Magnetic Recording Densities of 1–4 Tb/in²

Khunkitti

Pituso²,

Chaiduangsri³

et al. 2021

IEEE Access

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Several studies have confirmed that current-perpendicular-to-the-plane giant magnetoresistance (CPP-GMR) technology is appropriate for next-generation read sensors for ultrahigh areal densities (ADs) of data storage applications. Since the physical dimension of the read sensor is a crucial factor for developing the reader to overcome its limitations, this paper proposes an optimal sizing prediction of the CPP-GMR read heads for ADs of 1-4 Tb/in 2 . Micromagnetic modelling was performed in the simulations. The appropriate length of the stripe height (SH) and the read width (RW) of the readers was estimated based on a consideration of sensor outputs including the readback signal, asymmetry parameter, dibit response and power spectral density (PSD) profile. It was found that a variation of SH and RW lengths had an influential impact on the readback signal waveform. Those affectations were further characterized through the echoes of dibit response showing that shortening the SH length or increasing the RW length could improve the resolution and reduce the distortion occurring in the readback signal. Moreover, the PSD profile indicated that the reader operation became more stable at shorter SH lengths or longer RW lengths. The head response spectrum was also examined. In addition, the magnitude of the bias current was studied in relation to the head response. Lastly, the optimal physical dimension (SH×RW) of the CPP-GMR readers for ADs of 1-4 Tb/in 2 was predicted to be (40×48) nm, (28×29) nm, (25×26) nm and (19×20) nm, respectively. The results can be utilized to design the CPP-GMR sensors at ultrahigh magnetic recording capacities.INDEX TERMS Magnetic recording, Magnetic read heads, Current perpendicular-to-the-plane giant magnetoresistance, Heusler alloys.

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Section: A Optimal Sizing Ot the Cpp-gmr Sensor For Ad Of 1 Tb/inmentioning

confidence: 99%

Section: A Optimal Sizing Ot the Cpp-gmr Sensor For Ad Of 1 Tb/inmentioning

confidence: 99%