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Title: Controlled Phase and Tunable Magnetism in Ordered Iron Oxide Nanotube Arrays Prepared by Atomic Layer Deposition

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep18401· OSTI ID:1258607
 [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [3]
  1. Xi'an Jiaotong Univ., Xi'an (China)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Xi'an Jiaotong Univ., Xi'an (China); Simon Fraser Univ., Burnaby, BC (Canada)
+ Show Author Affiliations

Highly-ordered and conformal iron oxide nanotube arrays on an atomic scale are successfully prepared by atomic layer deposition (ALD) with controlled oxidization states and tunable magnetic properties between superparamagnetism and ferrimagnetism. Non-magnetic α-Fe2O3 and superparamagnetic Fe2O3with a blocking temperature of 120 K are in-situ obtained by finely controlling the oxidation reaction. Both of them exhibit a very small grain size of only several nanometers due to the nature of atom-by-atom growth of the ALD technique. Post-annealing α-Fe2O3 in a reducing atmosphere leads to the formation of the spinel Fe3O4 phase which displays a distinct ferrimagnetic anisotropy and the Verwey metal-insulator transition that usually takes place only in single crystal magnetite or thick epitaxial films at low temperatures. Finally, the ALD deposition of iron oxide with well-controlled phase and tunable magnetism demonstrated in this work provides a promising opportunity for the fabrication of 3D nano-devices to be used in catalysis, spintronics, microelectronics, data storages and bio-applications.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE
OSTI ID:
1258607
Journal Information:
Scientific Reports, Vol. 6; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 37 works
Citation information provided by
Web of Science

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Cited By (4)

Template-Assisted Fabrication of Nanostructured Arrays for Sensing Applications journal June 2018
Equilibrium, kinetic and thermodynamic study of pesticides removal from water using novel glucamine-calix[4]arene functionalized magnetic graphene oxide journal January 2019
Multiferroic heterostructures of Fe 3 O 4 /PMN-PT prepared by atomic layer deposition for enhanced interfacial magnetoelectric couplings journal February 2017
Conformality in atomic layer deposition: Current status overview of analysis and modelling journal June 2019

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