MSE 7025 Magnetic Materials (and Spintronics)
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1 MSE 7025 Magnetic Materials (and Spintronics) Lecture 1: Introduction Chi-Feng Pai
2 Course Outline Magnetism and Magnetic Materials What is magnetism? What is its origin? Magnetic properties (magnetization, hysteresis, magnetic anisotropy etc) Characterization techniques for magnetic properties Growth of magnetic materials Spintronics Spin + Electronics = spintronics! The rich family of magneto-resistance (MR) From HDD to MRAM to STT-MRAM
3 Course Outline References J.M.D. Coey, Magnetism and Magnetic Materials, Cambride University Press (2010) [Free e-book available] Stephen Blundell, Magnetism in Condensed Matter, Oxford University Press (2001) [Concise and easy-toread] Robert C. O Handley, Modern Magnetic Materials: Principles and Applications (2000) [A must-have reference book for magnetism people]
4 Course Outline Evaluation 40% HW, 30% mid-term, 30% final Ceiba Teaching Assistant 高偉倫 Wei-lun Kao
5 Course Outline Time Table Week Date Lecture 1 Feb 24 Introduction 2 March 2 Magnetic units and basic E&M 3 March 9 Magnetization: From classical to quantum 4 March 16 No class (APS March Meeting, Baltimore) 5 March 23 Category of magnetism 6 March 30 From atom to atoms: Interactions I (oxides) 7 April 6 From atom to atoms: Interactions II (metals) 8 April 13 Magnetic anisotropy 9 April 20 Mid-term exam 10 April 27 Domain and domain walls
6 Course Outline Time Table Week Date Lecture 11 May 4 Magnetization process (SW or Kondorsky) 12 May 11 Characterization: VSM, MOKE 13 May 18 Characterization: FMR 14 May 25 Transport measurements in materials I: Hall effect 15 June 1 Transport measurements in materials II: MR 16 June 8 MRAM: TMR and spin transfer torque 17 June 15 Guest lecture by Prof. S.Y. Huang (physics) 18 June 22 Final exam
7 Why magnetic materials?
8 Why magnetic materials? The first hard-disk drive developed by IBM, circa 1956
9 Why magnetic materials?
10 Why magnetic materials?
11 Why magnetic materials? CPU (STT-MRAM) Memory Storage
12 Why magnetic materials? Bruce Jacob, Spencer Ng and David Wang, Memory Systems: Cache, DRAM, Disk (1st Edition)
13 Why magnetic materials? SRAM Bruce Jacob, Spencer Ng and David Wang, Memory Systems: Cache, DRAM, Disk (1st Edition)
14 Why magnetic materials?
15 Why magnetic materials?
16 Why magnetic materials? Yuan Xie, "Modeling, Architecture, and Applications for Emerging Memory Technologies", IEEE Design & Test of Computers, vol.28, no. 1, pp , January/February 2011, doi: /mdt
17 Why magnetic materials?
18 Why magnetic materials? They are (almost) everywhere
19 Contemporary magnetism in a nutshell Physics MSE + Physics Magnetic properties Materials growth Characterization techniques Fabrication Applications and potential products MSE + Physics + EE + CS
20 Glossary (Properties) Saturation magnetization Curie temperature Neel temperature Anisotropy field Anisotropy energy Magnetoelastic constant Damping constant Magnetoresistance ratio Spin polarization
21 Glossary (Characterization) Vibrating sample magnetometry (VSM) Magneto-optical Kerr effect (MOKE) Ferromagnetic resonance (FMR) Hall effect Magnetoresistance (MR)
22 Glossary (Materials growth) Sputtering Evaporation Pulsed laser deposition (PLD) Molecular beam epitaxy (MBE) Liquid phase epitaxy (LPE)
23 Glossary (Fabrication) Photolithography E-beam lithography Ion-milling Reactive-ion etching (RIE) Chemical-mechanical polishing (CMP) Thermal annealing
24 Experimental Procedure
25 Experimental Procedure
26 Experimental Procedure
27 Fabrication (HDD and/or MRAM)
28 Fabrication (HDD and/or MRAM)
29 Fabrication (HDD and/or MRAM) How does a HDD work?
30 Fabrication (HDD and/or MRAM)
31 Fabrication (HDD and/or MRAM)
32 Fabrication (HDD and/or MRAM)
33 Fabrication (HDD and/or MRAM)
34 Fabrication (HDD and/or MRAM)
35 Fabrication (HDD and/or MRAM)
36 Fabrication (HDD and/or MRAM) Wang et. al., Micromachines 2015, 6(8), ; doi: /mi
37 Fabrication (HDD and/or MRAM)
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