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Welcome to the Physics & Astronomy Colloquium!

Colloquia are scheduled on Mondays at 11:00am in Peterson Hall 2, Room 110 (PH2-110, map). Refreshments are served at 10:45am in the room.

 

Monday November 23, 2009

Proximity Effect in Superconductor/Ferromagnet Hybrid Systems

Jiyeong Gu

Department of Physics & Astronomy, CSU Long Beach

Recent technological advances made it possible to creat hybrid nano-structures with high superconducting spin switch effectquality ferromagnet/superconductor (F/S) interfaces. The F/S systems have been the focus of intensive experimental and theoretical studies because of both exciting fundamental problems and potential device applications. The physical properties of both F and S films are strongly modified near the interface due to mutual proximity effect, for example, superconducting correlations penetrate into F and the spin polarization can extend into S. I will show an overview of experimental observations and theoretical predictions of F/S proximity effects including superconducting switching effect in F/S/F trilayer.

I will then describe my group's recent research on the exchange-spring/superconductor hybrid system. In exchange-coupled hard/soft bilayer systems, the mutual coupling of the soft and hard magnetic layers creates a spiral magnetic domain structure. We utilized the exchange-coupled hard/soft bilayer system, such as NiFe/SmCo or NiFe/SmFe, to vary the magnetic environment near the superconducting layer. The superconducting property of the hybrid system was investigated as function of the temperature and magnetic field.

Figure: superconducting spin switch.

 

For information and suggestions about the colloquium please contact the colloquium coordinator:
Name: Prof. Andreas Bill
Phone: (562) 985-8616
E-mail: abill@csulb.edu

Directions to Campus

  • Access to Campus
  • Campus Maps
  • Parking on campus: contact the coordinator of the colloquium. If not reachable, call the department office (562) 985-7925. If none of these are available at the time you need information, call (562) 985-4146 or go to the drive-through information booth at the main campus entrance (on Beach Drive, near the crossing to Bellflower).
  • Walk (or ask for a ride on an on-campus shuttle) to the department office: Peterson Hall 1, room 210. (PH1-210). The coordinator will provide the necessary informations.
  • Any question or problem: call the colloquium coordinator or the department office (562) 985-7925.

Colloquia Sponsors:

We acknowledge with gratitude donations and support from the following sponsors:

  • H.E. and H.B. Miller
  • Benjamin Carter
  • Sandra Dana
  • The Forty-Niner Shops, Inc.
  • Northrop Grumman Foundation
  • American Physical Society
  • Anonymous
If you wish to support the Colloquium, please contact the colloquium coordinator or the department chair. Thank you!

 

Colloquia Schedule

 

Academic Year 2008-2009

Date Title Speaker and Affiliation
Fall 2009
November 23
 Proximity Effect in Superconductor/Ferromagnet Hybrid Systems J. Gu, CSU Long Beach
November 16
 NMR and mSR as Probes of Quantum Criticality and Magnetic Frustration O. Bernal, CSU Los Angeles
November 9
 Investigating Complexity One Atom at a Time: Scanning Tunneling Microscopy of High-Temperature Superconductors E. Hudson, MIT
November 2
 Furlough: Campus closed Reason: budgetary cuts of the state of California with catastrophic consequences for our youth
October 26
 Frustrated, Degenerate, and Breaking Apart: The Bright Side of Life in Triangular Lattices A.L. Chernyshev, UC Irvine
October 19
 Inhomogeneity in VO2: Memristance and Other Effects T. Driscoll, UC San Diego
October 12
 Crystallization of a Solid: The Grain Size Distribution A. Bill, CSU Long Beach
October 5
 Archimede's Oldest Writings Under X-Ray Vision U. Bergmann, Stanford Synchrotron Radiation Lightsource (SSRL), and SLAC Nat. Accelerator Lab.
September 28
 In Case of Abrupt Climate Change, Break Glas G. Benford, UC Irvine
September 21
 Baryons as Relativistic Three-Quark Systems W. Plessas, University of Graz, Austria
September 14
 Meet the Students, Meet the Faculty, Meet the Staff! Chair and Faculty of the department

 

Last update: 11/19/09

Colloquium:

Monday, February 12, 2007, at 11am in SLH-50
Soft-pulse refocusing and decoherence for solid-state quantum computation
L. Pryadko, UC Riverside
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