Effects of anion size and disorder on spin resonance in the BEDT-TTF (bis(ethylenedithio)tetrathiafulvalene) salts
Conference
·
OSTI ID:7144765
The effect of different linear trihalide anions on electron spin resonance (ESR) spectra have been studied for single crystals of four BEDT-TTF salts plus one crystal containing mixed anions. Structural disorder is reflected in an increased low-temperature (residual) ESR linewidth for both ..beta..-(BEDT-TTF)/sub 2/I/sub 3/ and ..beta..-(BEDT-TTF)/sub 2/I/sub 2/Br and for (nominally) ..beta..-(BEDT-TTF)/sub 2/(AuI/sub 2/)/sub 0.82/(I/sub 3/)/sub 0.18/. Suppression of the disorder transition in ..beta..-(BEDT-TTF)/sub 2/I/sub 3/ by application of shear stress to form the ..beta../sup */-phase decreases the residual linewidth while increasing the onset of superconductivity from 1.5 to approx.8/degree/K. Anion size (or equivalently unit cell size) has been shown to correlate with the superconducting transition temperature in these isomorphic salts, but we find no correlation between anion size and the ESR spin susceptibility, linewidth or microwave conductivity. 22 refs., 4 figs., 1 tab.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA); Argonne National Lab., IL (USA)
- DOE Contract Number:
- AC04-76DP00789; W-31109-ENG-38
- OSTI ID:
- 7144765
- Report Number(s):
- SAND-88-0559C; CONF-880669-8; ON: DE88013022
- Country of Publication:
- United States
- Language:
- English
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Recent progress in BEDT-TTF (bis(ethylenedithio)-tetratiofulvalene) based synthetic metals
Conference
·
Sat Dec 31 23:00:00 EST 1988
·
OSTI ID:5371867
Pressure-temperature phase diagram, inverse isotope effect, and superconductivity in excess of 13 K in. kappa. -(BEDT-TTF) sub 2 Cu(N(CN) sub 2 )Cl, where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene
Journal Article
·
Sun Sep 01 00:00:00 EDT 1991
· Physical Review, B: Condensed Matter; (United States)
·
OSTI ID:5203072
Recent progress in BEDT-TTF (bis(ethylenedithio)-tetratiofulvalene) based synthetic metals
Conference
·
Wed Dec 31 23:00:00 EST 1986
·
OSTI ID:5797218
Related Subjects
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANIONS
BEDT-TTF
CHARGED PARTICLES
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON SPIN RESONANCE
GOLD COMPOUNDS
GOLD IODIDES
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
IODIDES
IODINE COMPOUNDS
IONS
LINE WIDTHS
MAGNETIC RESONANCE
MONOCRYSTALS
ORDER-DISORDER TRANSFORMATIONS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RESONANCE
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
360603* -- Materials-- Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANIONS
BEDT-TTF
CHARGED PARTICLES
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON SPIN RESONANCE
GOLD COMPOUNDS
GOLD IODIDES
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
IODIDES
IODINE COMPOUNDS
IONS
LINE WIDTHS
MAGNETIC RESONANCE
MONOCRYSTALS
ORDER-DISORDER TRANSFORMATIONS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RESONANCE
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS