NDLI: Effect of Current-Confined Path on Spin-Torque Noise in CPP-GMR Heads With Current Screen Layer

Content Provider	IEEE Xplore Digital Library
Author	Shiimoto, M. Katada, H. Nakamoto, K. Hoshiya, H. Das, S.
Copyright Year	1965
Abstract	We investigated the effect of current-confined path on spin-torque noise in current perpendicular to the plane giant magnetoresistive (CPP-GMR) heads with a current screen layer (a nano-oxide layer having current-confined paths). We found that both in measurement and calculation spin-torque noise of heads with a resistance area (RA) product of 1.0 Omega middot mum² was smaller than that with RA of 0.25 Omega middot mum². We also found that the calculated spin-torque noise decreased as the exchange stiffness constant in the free layer increased. These behaviors indicate that the magnetization fluctuation in conductive areas can be reduced by the magnetic coupling with the magnetization in nonconductive areas. Accordingly, the current screen structure is effective in suppressing the spin-torque noise. To reduce spin-torque noise in CPP-GMR heads with a current screen layer, it is effective to reduce the area of each metallic nano-hole while keeping the total conductive area constant since the magnetic coupling between the magnetization in conductive and nonconductive areas keeps strong.
Sponsorship	IEEE Magnetics Society
Starting Page	3605
Ending Page	3608
Page Count	4
File Size	587791
File Format	PDF
ISSN	00189464
Volume Number	44
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic heads Magnetic noise Magnetization Couplings Giant magnetoresistance Area measurement Electrical resistance measurement Noise measurement Fluctuations Noise reduction spin torque Current-confined path current perpendicular to the plane giant magnetoresistive (CPP-GMR) nano-oxide layer noise read head
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Spin-Torque Noise in CPP-GMR Heads With Current Screen Layer

Angular dependence of spin torque critical currents for CPP-GMR read heads

Thermal and spin-torque noise in CPP (TMR and/or GMR) read sensors

CPP–GMR Heads With a Current Screen Layer for 300 ${hbox{Gb/in}}^{2}$ Recording

Fabrication and Recording Study of All-Metal Dual-Spin-Valve CPP Read Heads

Magnetic Structure of Domain Walls Confined in a Nano-Oxide Layer

Spin-Torque Noise in CPP-GMR Heads with Current Screen Layer

CPP-GMR reader and wraparound shield writer for perpendicular recording

Localized Spin-Torque Effect in CPP-GMR Sensor With Current-Screen Layer

Effect of Current-Confined Path on Spin-Torque Noise in CPP-GMR Heads With Current Screen Layer

Similar Documents

Spin-Torque Noise in CPP-GMR Heads With Current Screen Layer

Angular dependence of spin torque critical currents for CPP-GMR read heads

Thermal and spin-torque noise in CPP (TMR and/or GMR) read sensors

CPP–GMR Heads With a Current Screen Layer for 300 ${hbox{Gb/in}}^{2}$ Recording

Fabrication and Recording Study of All-Metal Dual-Spin-Valve CPP Read Heads

Magnetic Structure of Domain Walls Confined in a Nano-Oxide Layer

Spin-Torque Noise in CPP-GMR Heads with Current Screen Layer

CPP-GMR reader and wraparound shield writer for perpendicular recording

Localized Spin-Torque Effect in CPP-GMR Sensor With Current-Screen Layer

Effect of Current-Confined Path on Spin-Torque Noise in CPP-GMR Heads With Current Screen Layer