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Anomalous NMR relaxation in an organic superconductor (BEDT-TTF)2Cu(NCS)2

✍ Scribed by T. Takahashi; T. Tokiwa; K. Kanoda; H. Urayama; H. Yamochi; G. Saito

Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 150 KB
Volume: 153-155
Category: Article
ISSN: 0921-4534
DOI: 10.1016/0921-4534(88)90696-x

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✦ Synopsis

We report the existence of drastic enhancement of NMR relaxation rate I/T 1 in the superconducting state of (BEDT-TTF)2Cu(NCS)2, a recently synthesized organic superconductor.

It was found that I/T I exhibits a sharp peak around 4 K, well below the transition temperature Tc=lO.4 K.

The peak value of I/T 1 is 30 times as large as that at T c at the external field of 3.28 kOe. At higher magnetic field the enhancement tends to be depressed.

Above Tc, TIT keeps nearly constant up to 77 K. Possible mechanisms responsible for the T 1 anomaly at low temperatures are discussed.

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