Angular dependence of FMR measurements in exchange ... - PiTP

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Easy (0 0) Hard(90 0 ) H c =( h R ‐h L )/2 H ex =(h R +h L )/2 See review articles by • Nogues and Schuller JMMM 192,203(1999) • Berkowitz and Takano JMMM 200,552 (1999) • Stamps J. Phys. D. 33, 247 (2000) • Kiwi JMMM 234,584 (2001) 4
• Different experimental techniques yield different values for the coupling field H ex at the interface • Hysteresis loops involve irreversible switching of the magnetization • FMR and BLS generally involve small pertubations of the magnetization about equilibrium and are reversible • In this talk I will discuss a particular NiFe/NiO bilayer system where both magnetization and FMR measurements have been performed by research groups in Manitoba. 5
Page 1 and 2: Magnetic North III Angular dependen
Page 3: 77 0 K • Ferro (F) and Anti‐fer
Page 7 and 8: Analysis • NiO film layers had cr
Page 9 and 10: McCord: Adv in Solid State Physics
Page 11 and 12: FMR Measurements • FMR measuremen
Page 13 and 14: • Irreversible switching is obser
Page 15 and 16: μ 0 M s =963 mT, γ= 176 GHz/T 2 0
Page 17 and 18: ? Theory 17
Page 19 and 20: 90 degrees x 2 =3 mT x 4 = ‐8mT x
Page 21 and 22: 0 degrees 90 degrees 21
Page 23 and 24: Downsweep 90 degrees 23
Page 25 and 26: Summary • Bilayers were fabricate

Angular dependence of FMR measurements in exchange ... - PiTP

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