Copper NQR studies of Ag-doped ternary sulfide Cu12As4S13 (tennantite)
Abstract
The investigations of Ag-contaning tennantite, belonging to the group of tetrahedrite-based sulfides, were performed by means of copper nuclear quadrupole resonance (NQR) in a temperature range from 4.2 K up to 60 K. These experiments showed that copper nuclear spin-lattice relaxation rate T1-1 and nuclear spin-echo decay rate T2-1 depend on temperature in the same way as earlier studied samples with other impurity compositions. The obtained data are interpreted from the viewpoint of internal motions in the structure of tennantite. The analysis of copper NQR data at low temperatures points to magnetic phase transition near 60 K from paramagnetic phase to the phase, which resembles spin-glass-like constitution.
Supporting agencies: The work was partly supported by the Russian Foundation for Basic Reserarch under Grant 06-02-17197a.
About the Authors
A. Yu. Orlova
Department of Physics, Kazan State University
Russian Federation
Russian Federation
Kazan 420008
R. R. Gainov
Department of Physics, Kazan State University
Russian Federation
Russian Federation
Kazan 420008
A. V. Dooglav
Department of Physics, Kazan State University
Russian Federation
Russian Federation
Kazan 420008
I. N. Pen'kov
Department of Geology, Kazan State University
Russian Federation
Russian Federation
Kazan 420008
N. N. Mozgova
Institute of Geology and Mineralogy, Russian Academy of Science
Russian Federation
Russian Federation
Moscow 119017
References
1. Mozgova N.N, Tsepin A.I., Fahlore, Nauka, Moscow (1983) (in Russian).
2. Wuench B.J., Takeuchi Y., Novacky W., Z. Kristallogr. 123, 1 (1966).
3. Lima-de-Faria J., Croat. Chem. Acta 72, 705 (1999).
4. Makovicky E., Skinner B.J., Can. Mineral. 17, 619 (1979).
5. Pattrick R.A.D., G. van der Laan, Vaughan V.J., Henderson C.M.B., Phys. Chem. Minerals. 20, 395 (1993).
6. Gainov R.R., Dooglav A.V., Pen’kov I.N., Solid State Commun. 140, 544 (2006); Gainov R.R., Dooglav A.V., Pen’kov I.N., Mukhamedshin I.R., Savinkov A.V., Mozgova N.N., Phys. Chem. Minerals 35, 37 (2008).
7. Bastow T.J., Campbell I.D., Whitfield H.J., Solid State Commun. 33, 399 (1980).
8. Grechishkin V.S., Nuclear quadrupole interactions in solid, Nauka, Moscow (1973) (in Russian)..
9. Slichter C.P., Principles of magnetic resonance, Springer-Verlag (1980).
10. Abragam A.A., Principles of Nuclear Magnetism, Clarendon Press, Oxford (1961).
11. Fujiyama S., Takigawa M., Horii S., Phys. Rev. Lett. 90, 147004 (2003).
12. Bloembergen N., Purcell E.M, Pound R.V., Phys. Rev. 73, 679 (1948).
13. Eremin M.V., Nikitin S.I., Prosvirnin S.Yu., Appl. Magn. Reson. 23, 97 (2002).
Review
For citations:
Orlova A.Yu., Gainov R.R., Dooglav A.V., Pen'kov I.N., Mozgova N.N. Copper NQR studies of Ag-doped ternary sulfide Cu12As4S13 (tennantite). Magnetic Resonance in Solids. 2008;10(1):6-10.
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