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Magneto-resistive and spin valve heads : fundamentals and applications

Author: John C Mallinson
Publisher: San Diego : Academic Press, ©2002.
Series: Electromagnetism.
Edition/Format:   Print book : English : 2nd edView all editions and formats
Database:WorldCat
Summary:

This text provides a comprehensive source on the physics and engineering of magneto-resistive heads. Most of the material is presented in a non-mathematical manner to make it more digestible for  Read more...

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Material Type: Internet resource
Document Type: Book, Internet Resource
All Authors / Contributors: John C Mallinson
ISBN: 0124666272 9780124666276
OCLC Number: 48481090
Notes: Revised edition of: Magneto-resistive heads. 1996.
Description: xxi, 184 pages : illustrations ; 24 cm.
Contents: Chapter 1 B, H, and M Fields 1 --
Magnetic Field H and Magnetic Moment [mu] 1 --
Electron Spin 3 --
Exchange Coupling 5 --
Magneto-Crystalline Anisotropy K 6 --
Magnetization M 7 --
Magnetic Poles and Demagnetizing Fields 8 --
Flux Density B and Flux [phi] 11 --
Chapter 2 Writing Process 14 --
Write-Head Field 14 --
Written Magnetization Transition M(x) 17 --
Chapter 3 Reading Process 21 --
Recording Medium Fringing Fields 21 --
Read-Head Flux 22 --
Output Voltage 23 --
Output Spectrum 24 --
Digital Output Pulse 24 --
Chapter 4 Anisotropic Magneto-Resistive Effect 27 --
Basic Effect 27 --
Magneto-Resistive Sensors or Elements 28 --
Magneto-Resistive Coefficient [Delta rho]/[rho subscript 0] 34 --
Unique Properties of Permalloy 35 --
Chapter 5 Giant Magneto-Resistive Effect 39 --
Superlattices 39 --
Physics of the GMR Effect 43 --
Granular GMR Materials 47 --
Chapter 6 Vertical Biasing Techniques 50 --
Permanent Magnet Bias 50 --
Current Bias 51 --
Soft Adjacent Layer Bias 53 --
Double Magneto-Resistive Element 54 --
Self-Bias 55 --
Exchange Bias 56 --
Barber-Pole Scheme 58 --
Split-Element Scheme 59 --
Servo-Bias Scheme 60 --
Chapter 7 Horizontal Biasing Techniques 64 --
Conductor Overcoat 65 --
Exchange Tabs 66 --
Hard Films 67 --
Closed Flux 68 --
MRH Initialization Procedures 68 --
Chapter 8 Hunt's Unshielded Horizontal and Vertical Anisotropic Magneto-Resistive Heads 72 --
Unshielded Horizontal Head 74 --
Unshielded Vertical Head 76 --
Single Magnetization Transition Pulse Shapes 78 --
Side-Reading Asymmetry 79 --
Chapter 9 Single-Element Shielded Vertical Magneto-Resistive Heads 81 --
Function of the Shields 81 --
MRE Shield Magnetic Transmission Line 84 --
Shielded MRH Output Voltage Spectra 87 --
Shielded MRH Designs 91 --
Chapter 10 Simple Spin Valve Giant Magneto-Resistive Heads 94 --
Spin Valve GMRHs 94 --
Chapter 11 Enhanced Spin Valves 100 --
Top and Bottom Spin Valves 100 --
Exchange Coupling Phenomena 101 --
Cobalt "Dusting" and CoFe Alloys 105 --
Spin Valve Biasing Effects 106 --
Unpinning Phenomena 109 --
Chapter 12 Synthetic Antiferro- and Ferrimagnets 111 --
In the Pinned Layer 111 --
In the Free Layer 115 --
Chapter 13 Antiferromagnet Upsets 118 --
Chapter 14 Flux-Guide and Yoke-Type Magneto-Resistive Heads 121 --
Flux-Guide MRHs 122 --
Yoke-Type MRHs 123 --
Chapter 15 Double-Element Magneto-Resistive Heads 125 --
Classification of Double-Element MRHs 126 --
Advantages of Double-Element MRHs 129 --
Chapter 16 Comparison of Shielded Magneto-Resistive Head and Inductive Head Outputs 132 --
Small-Signal Voltage Spectral Ratio 132 --
Large-Signal Voltage Comparison 134 --
Chapter 17 Simplified Design of a Shielded Anisotropic Magneto-Resistive Head 138 --
Written Magnetization Transition 138 --
Inductive and Shielded MRH Output Pulses 140 --
MRE Thickness T 141 --
MRE Depth D 142 --
Measuring Current I 143 --
Isolated Transition Peak Output Voltage [delta] V 144 --
Optimized MRH versus Inductive Head Voltages 145 --
Chapter 18 Simplified Design of a Shielded Giant Magneto-Resistive Head 147 --
Written Magnetization Transition 147 --
Inductive and Shielded GMRH Output Pulses 149 --
MRE Thickness T 150 --
MRE Depth D 151 --
Measuring Current I 152 --
Isolated Transition Peak Output Voltage [delta] V 152 --
Future Projections 153 --
Chapter 19 Read Amplifiers and Signal-to-Noise Ratios 157 --
MRH Read Amplifiers 157 --
Signal-to-MRH Noise Ratios 159 --
Magnetization Fluctuation Noise 161 --
Chapter 20 Colossal Magneto-Resistance and Electron Spin Tunneling Heads 166 --
Colossal Magneto-Resistance 166 --
Magnetic Tunneling Junctions 168 --
Chapter 21 Electrostatic Discharge Phenomena 171 --
Appendix Cgs-emu and MKS-SI (Rationalized) Units 174.
Series Title: Electromagnetism.
Responsibility: John C. Mallinson.
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"This book is particularly valuable for its discussions. With his very good feeling (or better formulated: experience), John Mallinson consistently finds a good balance between evaluating or Read more...

 
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