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  • Re: PFM

    Certainly! There is no special requirement to do PFM (just use contact mode and configure the lockins through generic lockin). I recommend putting the AC bias to the tip and reducing the 'amplitude limit' for the lockin that you are using. I think lockins 2 and 3 are preferred depending on your AC freq (use lockin 2 for high freq). The Dimension
    Posted to SPM Digest (Forum) by Bede Pittenger on Thu, Jul 20 2017
  • Advanced AFM and AFM Raman workshop July 12 2012

    Posted to SPM Digest (Forum) by Mayur Savla on Wed, Jun 27 2012
  • Re: multimode photodiode

    Hi Stefano, Don't worry, the crocodiles don't bite! The low noise head definitely has benefits over the old MultiMode head. But the name could be a little confusing, so it's good that you ask specifically what things are improved. The low noise heads were developed specifically to reduce the phenomena of laser interference. This was sometimes
    Posted to SPM Digest (Forum) by Ben Ohler on Fri, Mar 2 2012
  • Re: Direction of current in C-AFM

    The C-AFM polarity convention with Multimode is: positive current means the current is flowing from the sample to the tip. Another way to say this is: if you use a positive sample bias, you would read a posistive current. When you say there is "no" bias applied, ideally that means 0 V. But no system is ideal, there is always some noise in
    Posted to SPM Digest (Forum) by Chunzeng Li on Thu, Mar 3 2011
  • Thermal ground-state ordering and elementary excitations in artificial magnetic square ice

    All, Nice paper on high resolution MFM by Morgan et. al. in Nature Physics. Data taken using the MM and Dimension. Check it out at: http://www.nature.com/nphys/journal/v7/n1/full/nphys1853.html Steve
    Posted to SPM Digest (Forum) by Stephen Minne on Fri, Feb 4 2011
  • Congratulations to the 2010 Physics Nobel Prize winners

    I'd like to echo Steve's congratulations to this year's Nobel Prize winners in physics, Andre Geim and Konstantin Novoselov at the University of Manchester. You've got to love that their sample prep technique for graphene is now called the "Scotch tape technique". I'm looking forward to all sorts of interesting science
    Posted to SPM Digest (Forum) by Bede Pittenger on Wed, Oct 6 2010
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