109Ag NMR investigation of atomic motions in the incommensurate and paraelectric phases of proustite (Ag3AsS3)

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Publication Type Journal Article
School or College College of Science
Department Physics
Creator Ailion, David Charles
Other Author Subramanian, Raman K.; Muntean, Ligia; Norcross, James A.
Title 109Ag NMR investigation of atomic motions in the incommensurate and paraelectric phases of proustite (Ag3AsS3)
Date 2000
Description 109Ag NMR line shape, T1 , Hahn spin echo, and Carr-Purcell-Meiboom-Gill ~CPMG! spin-echo measurements were performed in proustite (Ag3AsS3) between 420 and 47 K in order to understand the role of atomic motions in phase transitions in a system containing an incommensurate phase. These measurements indicate a definite change in the motional characteristics of Ag ions near 240 K. Above 240 K, an Ag1 ion executes fast jump motions between its six inequivalent chemically shifted sites. However, below 240 K, these motions are too slow to affect the line shapes. The NMR line shape results are consistent with the existence of a 3q incommensurate phase between 60 and 50 K. Between 180 and 55 K, Hahn and CPMG spin-echo decay measurements suggest that slow motions exist. These motions are attributed ~1! in the paraelectric phase ~above 60 K! to slow jumping of an Ag1 ion between its inequivalent sites with a jump time of the order of the Hahn spin-echo time and ~2! in the incommensurate phase (50 - 60 K) to ultraslow motion of the incommensurate modulation wave. This paper constitutes a report of the effect on the Hahn spin-echo decay due to atoms jumping between sites characterized by different chemical shifts.
Type Text
Publisher American Physical Society
Journal Title Physical Review B
Volume 61
First Page 996
Last Page 1002
Subject NMR; Atomic motion; Proustitie; Phase transitions; Line shape
Subject LCSH Nuclear magnetic resonance; Atoms; Phase transformations (Statistical physics)
Language eng
Bibliographic Citation Subramanian, R. K., Muntean, L., Norcross, J. A., & Ailion, D. C. (2000). 109Ag NMR investigation of atomic motions in the incommensurate and paraelectric phases of proustite (Ag3AsS3). Physical Review B, 61, 996-1002.
Rights Management (c) American Physical Society
Format Medium application/pdf
Format Extent 96,238 Bytes
Identifier ir-main,5035
ARK ark:/87278/s6xh08t4
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2012-07-11
ID 707178
Reference URL https://collections.lib.utah.edu/ark:/87278/s6xh08t4
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