Effect of Nd content on natural resonance frequency and microwave permeability of Nd2Fe14B/α-Fe nanocomposites in 26.5–40GHz frequency range

2007 ◽  
Vol 441 (1-2) ◽  
pp. 301-304 ◽  
Author(s):  
L.X. Lian ◽  
L.J. Deng ◽  
M. Han ◽  
S.D. Feng
Keyword(s):  
Resonance Frequency ◽  
Frequency Range ◽  
Natural Resonance ◽  
Microwave Permeability ◽  
Natural Resonance Frequency

Effect of Microwires Diameters on the Microwave Properties of Glass-Coated Microwires/Dielectric Composite

2013 ◽  
Vol 873 ◽  
pp. 366-372
Author(s):  
Yong Jiang Di ◽  
Deng Ming Chen ◽  
Peng Jun Cao ◽  
Bi Jia
Keyword(s):  
Coaxial Line ◽  
Microwave Properties ◽  
Complex Permeability ◽  
Frequency Range ◽  
Dielectric Composite ◽  
Natural Resonance ◽  
Microwave Permeability ◽  
Natural Resonance Frequency ◽  
Microwave Permittivity ◽  
Composite Samples

The microwave properties of Glass-coated FeCuNbVSiB and CoFeNiSiB microwires/dielectric composite with different microwires diameters were studied. Relative complex permeability and complex permittivity was measured by transmission/reflection (T/R) coaxial line method at the frequency range of 2-18 GHz for composite samples. The results show that the microwave permeability and permittivity increases with the lengthening of the microwires in composite. The microwave permeability, natural resonance frequency and microwave permittivity increase with the decrease of the diameter of the microwires.

A Review of Recent Developments in Atomic Force Microscopy Systems With Application to Manufacturing and Biological Processes

2003 ◽  
Author(s):  
Karthik Laxminarayana ◽  
Nader Jalili
Keyword(s):  
Resonance Frequency ◽  
Intermolecular Forces ◽  
Minimal Amount ◽  
Contact Mode ◽  
Tapping Mode ◽  
Atomic Force ◽  
Natural Resonance ◽  
Target Sample ◽  
Recent Developments ◽  
Natural Resonance Frequency

The atomic force microscope (AFM) system has evolved into a useful tool for direct measurements of microstructural parameters and intermolecular forces at nanoscale level with atomic-resolution characterization. Typically, these microcantilever systems are operated in three open-loop modes; non-contact mode, contact mode, and tapping mode. In order to probe electric, magnetic, and/or atomic forces of a selected sample, the non-contact mode is utilized by moving the cantilever slightly away from the sample surface and oscillating the cantilever at or near its natural resonance frequency. Alternatively, the contact mode acquires sample attributes by monitoring interaction forces while the cantilever tip remains in contact with the target sample. The tapping mode of operation combines qualities of both the contact and non-contact modes by gleaning sample data and oscillating the cantilever tip at or near its natural resonance frequency while allowing the cantilever tip to impact the target sample for a minimal amount of time. Recent research on AFM systems has focused on many fabrication and manufacturing processes at molecular levels due to its tremendous surface microscopic capabilities. This paper provides a review of such recent developments in AFM imaging systems with emphasis on operational modes, microcantilever dynamic modeling and control. Due to the important contributions of AFM systems to manufacturing, this paper also provides a comprehensive review of recent applications of different AFM systems in these important areas.

Spin sprayed Ni(–Zn)–Co ferrite films with natural resonance frequency exceeding 3GHz

2007 ◽  
Vol 101 (9) ◽  
pp. 09M502 ◽  
Author(s):  
Koichi Kondo ◽  
Shigeyoshi Yoshida ◽  
Hiroshi Ono ◽  
Masanori Abe
Keyword(s):  
Resonance Frequency ◽  
Natural Resonance ◽  
Ferrite Films ◽  
Natural Resonance Frequency
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