Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 183, Issue 7, Pages 1490-1495Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2010.04.027
Keywords
Manganese dioxides; High magnetic field; Chain shape; Electromagnetic properties
Funding
- Doctoral Program of Higher Education of China [20090041120038]
- Aero Science Foundation of China [20095463008]
- Research Fund for the Advanced Research of the Weapon Equipment of China [2009317]
- National R&D Infrastructure and Facility Development Program of China [2005DKA10400]
- Growth Foundation for the Youth Teachers of the Dalian University of Technology
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MnO2 with a sea urchin-like ball chain shape was first synthesized in a high magnetic field via a simple chemical process, and a mechanism for the formation of this grain shape was discussed. The as-synthesized samples were characterized by XRD, SEM, TEM, and vector network analysis. The dielectric constant and the loss tangent clearly decreased under a magnetic field. The magnetic loss tangent and the imaginary part of the magnetic permeability increased substantially. Furthermore, the theoretically calculated values of reflection loss showed that the absorption peaks shifted to a higher frequency with increases in the magnetic field strength. (C) 2010 Elsevier Inc. All rights reserved.
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