用于NMR研究的宽带光谱仪
A Wideband Spectrometer for NMR Studies
摘要：
本文介绍了一种磁感应强度高达10 T的宽带分米波（200 ~ 900 MHz）谱仪的设计。该谱仪用于研究低温（4.2 - 1.3K）下反铁磁体的电子-核振荡.用~（55）Mn ~（2+）NMR谱测定了温度T = 1.3K时非共线反铁磁体Mn_3Al_2Ge_3 O_（12）中重取向转变的临界场H_c = 2.5 ± 0.3T。
英文摘要：
The design of a wideband decimeter-wave (200 - 900 MHz) spectrometer with a magnetic induction of up to ~ 10 T is described. This spectrometer is intended for studying electronic - nuclear oscillations in antiferromagnets at low temperatures (4.2 - 1.3 K). Critical field H_c = 2.5 +/- 0.3 T of a reorientation transition in a noncollinear antiferromagnet Mn3Al2Ge3O12 at temperature T = 1.3 K was determined from a 55Mn2+ NMR spectrum.
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