Structure and magnetotransport properties of the new quasi-two-dimensional molecular metal {beta}''-(BEDT-TTF){sub 4}H{sub 3}O[Fe(C{sub 2}O{sub 4}){sub 3}] . C{sub 6}H{sub 4}Cl{sub 2}

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1007/S11447-008-2013-0· OSTI ID:21075607

Prokhorova, T G ^[1]; Khasanov, S S; Shibaeva, R P; Manakov, A I; Zverev, V N ^[2]; Buravov, L I; Yagubskii, E B ^[1]

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1. Russian Academy of Sciences, Institute of Problems of Chemical Physics, Chernogolovka Branch (Russian Federation)
2. Russian Academy of Sciences, Institute of Solid State Physics (Russian Federation)

The {beta}''-(BEDT-TTF){sub 4}A{sup I}[M{sup III}(C{sub 2}O{sub 4}){sub 3}] . G(A{sup I}=NH{sub 4}{sup +}, H{sub 3}O{sup +}, K{sup +}, Rb{sup +}; M{sup III}=Fe, Cr; G = 'guest' solvent molecule) family of layered molecular conductors with magnetic metal oxalate anions exhibits a pronounced dependence of the conducting properties on the type of neutral solvent molecules introduced into the complex anion layer. A new organic dichlorobenzene (C{sub 6}H{sub 4}Cl{sub 2})-containing conductor of this family, namely, {beta}''-(BEDT-TTF){sub 4}H{sub 3}O[Fe(C{sub 2}O{sub 4}){sub 3}] . C{sub 6}H{sub 4}Cl{sub 2}, is synthesized. The structure of the synthesized single crystals studied by X-ray diffraction is characterized by the following parameters: a = 10.421(1) A, b= 19.991(2) A, c= 35.441(3) A, {beta} = 92.87(1){sup o}, V= 7374(1) A{sup 3}, space groupC2/c, and Z = 4. In the temperature range 0.5 and 2-300 K, the conductivity of the crystals is metallic without changing into a superconducting state. The magnetotransport properties of the crystals are examined in magnetic fields up to 17 T at T = 0.5 K. In fields higher than 10 T, Shubnikov-de Haas oscillations are detected, and the Fourier spectrum of these oscillations contains two frequencies with maximum amplitudes of about 80 and 375 T. The experimental results are compared with the related data obtained for other phases of this family. The possible structural mechanisms of the effect of a guest solvent molecule on the transport properties of the {beta}''-(BEDT-TTF){sub 4}A{sup I}[M{sup III}(C{sub 2}O{sub 4}){sub 3}] . G crystals are analyzed.

• OSTI ID: 21075607
• Journal Information: Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 2 Vol. 106; ISSN JTPHES; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMMONIUM COMPOUNDS
ANIONS
BEDT-TTF
CHROMIUM COMPOUNDS
IRON COMPOUNDS
MAGNETIC FIELDS
MONOCRYSTALS
OSCILLATIONS
OXALATES
OXONIUM IONS
POTASSIUM IONS
RUBIDIUM IONS
SOLVENTS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION