Temperature Dependence of ~(14)N NQR and Phase Transitions in KNO_2 Powder

Hae Jin Kim; Kee Tae Han; Sung Ho Choh

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Temperature Dependence of ~(14)N NQR and Phase Transitions in KNO_2 Powder

机译：KNO_2粉末中〜（14）N NQR的温度依赖性和相变

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The temperature dependence of ~(14)N NQR, measured at 77 to 300 K, is in better agreement with the model proposed by Blinc et al. than the Bayer theory. The nuclear quadrupole coupling constant and asymmetry parameter show a discontinuity at about 160 K and 230 K, respectively. The linewidths are broadened at these temperatures up to 22 kHz and 18 kHz, respectively. These results indicate that KNO_2 undergoes phase transitions at these two temperatures.

机译：〜（14）N NQR的温度依赖性（在77至300 K下测得）与Blinc等人提出的模型更好地吻合。比拜耳理论更重要。核四极偶合常数和不对称参数分别在160 K和230 K处显示不连续性。在这些温度下，线宽分别加宽到22 kHz和18 kHz。这些结果表明，KNO_2在这两个温度下经历相变。

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《Zeitschrift fur Naturforschung. A, A journal of physical sciences》 |1996年第6期|p.769-772|共4页
作者
Hae Jin Kim; Kee Tae Han; Sung Ho Choh;
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Department of Physics, Korea University, Seoul 136-701, Republic of Korea;

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正文语种 eng
中图分类物理学;
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Temperature Dependence of ~(14)N NQR and Phase Transitions in KNO_2 Powder

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