Evidence from 1H-NMR for a Crossover from “Local-Moment” Antiferromagnetism to Spin-Density Wave in (TMTTF)2Br with Application of Pressure
Overview & Synopsis
We have made measurements of the proton spin-lattice relaxation in the low-temperature antiferromagnetic ground state of (TMTTF)2Br at different pressures. At ambient pressure, the relaxation rate 1/T1 is peaked at the transition temperature with isotropic critical fluctuations apparent over a wide temperature range. 1/T1 declines monotonically as the temperature is lowered. Application of hydrostatic pressure results in additional relaxation, very likely from collective excitations, in the ordered phase. The results taken together imply the system is driven from commensurability at a very low pressure (< 4 kbar). The behavior is summarized in a P-T phase diagram.
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Document Information
| Document Title | Evidence from 1H-NMR for a Crossover from “Local-Moment” Antiferromagnetism to Spin-Density Wave in (TMTTF)2Br with Application of Pressure |
|---|---|
| Author / Organization | B. Klemme, S. Brown, P. Wzietek, D. Jérome, J. Fabre |
| Subject & Discipline | Multidisciplinary Academic Open Research |
| Categories | Science & Mathematics |
| Publication Year | 1996 |
| License / Rights | Open Access / Creative Commons |
| Resource Verification | Listed PDF (Verification Pending) |
| Original Host Website |
HAL Open Science
(hal.science)
|
| File Format | application/pdf (Portable Document Format) |
| Language | EN |
| Catalog ID | DOC-37563 |
| Original Source Link | Visit Source Page on hal.science » |