Title :
Dielectric properties of high-T/sub c/ substrates up to 40 GHz
Author :
Konopka, J. ; Wolff, I.
Author_Institution :
Duisburg Univ., Germany
Abstract :
The authors present the results of a systematic study of the dielectric permittivities of CaNdAlO/sub 4/, LaAlO/sub 3/, SrLaAlO/sub 4/, SrLaGaO/sub 7/, and NdGaO/sub 3/ monocrystals in the frequency range from 4 GHz to 40 GHz based on the measurement of self-resonances of a rectangular cavity completely filled with the investigated material in the temperature range from 10 K to 300 K. Most materials exhibited anisotropy while in CaNdAlO/sub 4/ and NdGaO/sub 3/ pronounced loss increase was found at temperatures below 100 K, probably of magnetic origin.<>
Keywords :
cadmium compounds; dielectric losses; lanthanum compounds; neodymium compounds; permittivity; strontium compounds; substrates; 10 to 300 K; 4 to 40 GHz; CaNdAlO/sub 4/; LaAlO/sub 3/; NdGaO/sub 3/; SrLaAlO/sub 4/; SrLaGaO/sub 7/; anisotropy; dielectric permittivities; high temperature superconductor substrates; loss increase; rectangular cavity; self-resonances; Anisotropic magnetoresistance; Dielectric loss measurement; Dielectric losses; Frequency measurement; Loss measurement; Magnetic anisotropy; Magnetic materials; Magnetic properties; Permittivity; Temperature distribution;
Conference_Titel :
Microwave Symposium Digest, 1992., IEEE MTT-S International
Conference_Location :
Albuquerque, NM, USA
Print_ISBN :
0-7803-0611-2
DOI :
10.1109/MWSYM.1992.188166
