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Title: Exchange spring in A1/L1{sub 0} FePt composite and its application in magnetic force microscope

This paper reported fabrication of Fe{sub x}Pt{sub 100-x} films with (001) epitaxy on MgO(100) substrates. The atomic percentage of Fe was changed within the range of x = 10–85 in order to search the optimal atomic ratio for achieving both high and isotropic-like coercivity. It was found that the Fe{sub 60}Pt{sub 40} film exhibited large coercivities exceeding 5 kOe along both in-plane and out-of-plane directions due to the formation of A1/L1{sub 0} FePt composite. A penta-domain model for hard/soft/hard exchange spring system was proposed to interpret the anomalous magnetization behaviors observed in Fe{sub 60}Pt{sub 40} sample. By using Fe{sub 60}Pt{sub 40} as the magnetic coating layer on a probe of magnetic force microscope, the flux changes at a linear density of 1000 kfci could be readily observed at a resolution of ∼13 nm.
Authors:
; ; ; ; ;  [1] ;  [2]
  1. School of Physical Science and Technology, Southwest University, Chongqing 400715 (China)
  2. School of Material Science and Technology, Tongji University, Shanghai 200092 (China)
Publication Date:
OSTI Identifier:
22412704
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COERCIVE FORCE; COMPOSITE MATERIALS; CONCENTRATION RATIO; DENSITY; EPITAXY; FABRICATION; FILMS; IRON; IRON ALLOYS; LAYERS; MAGNESIUM OXIDES; MAGNETIZATION; PLATINUM BASE ALLOYS; PROBES; RESOLUTION; SUBSTRATES