Effect of deuteration on the electrical conductivity, dielectric constant ...
Effect of deuteration on the electrical conductivity, dielectric constant ...
Effect of deuteration on the electrical conductivity, dielectric constant ...
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Volume 89A, number 1 PHYSICS LETIERS 19 April 1982<br />
have given direct evidences regarding <strong>the</strong> phase transiti<strong>on</strong><br />
mechanisms in <strong>the</strong>se crystals. Here <strong>the</strong> experimental<br />
results from c<strong>on</strong>ductivity and <strong>dielectric</strong> measurements<br />
c<strong>on</strong>clusively show that DLAS undergoes<br />
two phase transiti<strong>on</strong>s at _1.5° C and 191°C corresp<strong>on</strong>ding<br />
to <strong>the</strong> two transiti<strong>on</strong>s in LAS occurring at 10° C<br />
and 186.5°C. The transiti<strong>on</strong> at 10°C in LAS is a structural<br />
<strong>on</strong>e (accompanied by a unit cell doubling al<strong>on</strong>g<br />
<strong>the</strong> a-directi<strong>on</strong>) which has already been studied in detail<br />
[6,7]. On <strong>the</strong> o<strong>the</strong>r hand no serious attempt has<br />
so far been made in studying <strong>the</strong> mechanism involved<br />
in <strong>the</strong> recently observed high temperature transiti<strong>on</strong><br />
in this crystal except that due to Syamaprasad and<br />
Vallabhan, who suggested from <strong>electrical</strong> c<strong>on</strong>ductivity<br />
and i<strong>on</strong>ic <strong>the</strong>rmo
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