Growth-related magnetic and physical structures in CMR films

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Scanning tunneling microscopy (STM), atomic force microscopy (AFM), and magnetic force microscopy (MFM) have proven to be powerful tools for revealing property-sensitive structures in magnetic materials. With the renewed interest in perovskite films as materials for read-heads in high density magnetic data storage, the same challenges faced by high temperature superconductor (HTS) film fabrication are repeated for these materials. To begin addressing these challenges, we used vapor phase epitaxy to fabricate La (Sr, Ca,) based manganate films on single crystal perovskite substrates under different conditions and characterized them with scanning probe microscopies, x-ray diffraction, and temperature-dependent magnetization and resistivity measurements ... continued below

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18 p.

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Hawley, M.E.; Brown, G.W. & Hundley, M.F. September 1, 1997.

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Description

Scanning tunneling microscopy (STM), atomic force microscopy (AFM), and magnetic force microscopy (MFM) have proven to be powerful tools for revealing property-sensitive structures in magnetic materials. With the renewed interest in perovskite films as materials for read-heads in high density magnetic data storage, the same challenges faced by high temperature superconductor (HTS) film fabrication are repeated for these materials. To begin addressing these challenges, we used vapor phase epitaxy to fabricate La (Sr, Ca,) based manganate films on single crystal perovskite substrates under different conditions and characterized them with scanning probe microscopies, x-ray diffraction, and temperature-dependent magnetization and resistivity measurements (M(T) and {rho}(T)). The as-grown films were polygranular with grain sizes increasing with increasing temperature (T). The post-deposition annealed films consisted of coalesced layers with improved transport properties. The room temperature magnetic structure of the Sr-based films appeared to be related to defects and/or strain.

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18 p.

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OSTI as DE97008965

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  • 99. annual meeting of the American Ceramic Society, Cincinnati, OH (United States), 4-7 May 1997

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  • Other: DE97008965
  • Report No.: LA-UR--97-2074
  • Report No.: CONF-970568--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 539882
  • Archival Resource Key: ark:/67531/metadc696666

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  • September 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • May 20, 2016, 2:52 p.m.

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Hawley, M.E.; Brown, G.W. & Hundley, M.F. Growth-related magnetic and physical structures in CMR films, article, September 1, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc696666/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.