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SUMMARY:Reversible Control of NON-Volatile Magnetic Memory Using Soft Mate
 rials: Liquid-Crystalline Elastomer Nanocomposites - Raffaele Mezzenga\, E
 TH Zurich
DTSTART:20140124T140000Z
DTEND:20140124T150000Z
UID:TALK50339@talks.cam.ac.uk
CONTACT:Alessio Zaccone
DESCRIPTION:Switchable magnetic information found in some inorganic materi
 als is the fingerprint of countless technological applications\, but poor 
 control over processability and magnetic anisotropicity imposes severe res
 trictions\, calling for advanced techniques. In this talk I will present a
  new class of stimuli-responsive materials\, which combines the actuation 
 potential of liquid-crystalline elastomers (LCE) with the anisotropic magn
 etic properties of ellipsoidal iron-oxide nanoparticles. The resulting hyb
 rid nanocomposites exhibit unique shape-memory features allowing via simpl
 e low-stress deformation the reversible storage of magnetic information\, 
 which can be erased at low temperature by heating above the LCE smectic-is
 otropic transition. To illustrate the applicability of this concept\, it w
 ill be shown how the magnetic information can be read\, for example\, by m
 agnetic torque measurements. These new nanocomposites offer the unpreceden
 ted possibility of manipulating magnetic properties at control parameters\
 , such as deformation\, stress and resetting temperatures\, typical of sof
 t materials\, opening up new scenarios in micro-actuators\, magnetic stora
 ge devices\, sensors or artificial muscles applications.\nReversible magne
 tic memory stored in LCE nanocomposites\, as read by magnetic torque measu
 rements. \nReferences\nJ. M. Haberl\, A. Sánchez-Ferrer\, A. M. Mihut\, H
 . Dietsch\, R. Mezzenga\, Adv. Mater. 2013\, 25\, 1787-1791.\nJ. M. Haberl
 \, A. Sánchez-Ferrer\, A. M. Mihut\, H. Dietsch\, R. Mezzenga\, Nanoscale
  2013\, 5\, 5548.\nJ. M. Haberl\, A. Sánchez-Ferrer\, A. M. Mihut\, H. Di
 etsch\, R. Mezzenga\, Adv. Funct. Mater. In press\n
LOCATION:Small Lecture Theatre\, Cavendish Laboratory
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