The spin-peierls transition in the (BPDT-TTF)2I3 organic complex

Synthetic Metals, 41-43 (1991) 1688

1688

THE S P I N - P E I E R L S (BPDT-TTF)zI

V.A.

TRANSITION

ORGANIC

Merzhanov,

USSR A c a d e m y Physics,

N.D.

ESR spectra out that

Kushch

of Sciences,

Chernogolovka,

The study of

for T

are d e s c r i b e d

fairly well

B e l o w 50 K a

dipole-dipole

has been

there

carried.

properties

with

appears

caused

chain.

coupling

model

gap

is

susceptibility

by the H e i s e n b e r g ' s

J=170 K.

spectrum

of Chemical

USSR

> 50 K the m a g n e t i c

antiferromagnetic

Romanyukha

of the static m a g n e t i c

(BPDT-TTF)zl s

which

A.A.

Institute

antiferromagnetic

the ESR

and

142432

isotropic

spectrum,

IN THE

COMPLEX

an in

by

of

a

one-dimensional

spin

that b e l o w

doublet

found

(BPDT-TTF)zl s

alternation

It is o b s e r v e d emerges

It was

exchange the

and the

formed

integral exitation of

the

10

K by

in the

of spins.

Elsevier Sequoia/Printed in The Netherlands