ALUMINUM AND BORON NUCLEAR-QUADRUPOLE RESONANCE WITH A DIRECT-CURRENT SUPERCONDUCTING QUANTUM INTERFERENCE DEVICE

被引：12

作者：

CONNOR, C

CHANG, J

PINES, A

机构：

[1] UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720

[2] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB,DIV MAT & CHEM SCI,BERKELEY,CA 94720

来源：

JOURNAL OF CHEMICAL PHYSICS | 1990年 / 93卷 / 11期

关键词：

D O I：

10.1063/1.459395

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the application of our dc SQUID (superconducting quantum interference device) spectrometer [C. Connor, J. Chang, and A. Pines, Rev. Sei. Instrum. 61, 1059( 1990) ] to nuclear quadrupole resonance (NQR) studies of aluminum-27, and boron-11 in crystalline and glassy solids. Our results give e2qQ/h = 2.38 MHz and η = 0.0 for a-A12O3 at 4.2 K. For the natural mineral petalite (LiA1Si4O10 ), we obtain e2qQ/h = 4.56 MHz and η= 0.47. The quadrupole resonance frequency is 1467 kHz in boron nitride, and in the vicinity of 1300 kHz for various borates in the B2 O3 xH2 O system. The distribution of boron environments in a B2O3 glass gives rise to a linewidth of about 80 kHz in the SQUID detected resonance.

引用

页码：7639 / 7646

页数：8

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