a new model of correlated disorder in relaxor ferroelectrics
a new model of correlated disorder in relaxor ferroelectrics
a new model of correlated disorder in relaxor ferroelectrics
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1D data vs. PNR <strong>model</strong>s<br />
typically decays as ~q -2 ; never reaches q -4 ( ) ( ) ( )<br />
ξ<br />
G(<br />
q)<br />
=<br />
1+<br />
q ξ<br />
//<br />
2<br />
//<br />
2<br />
//<br />
ξ<br />
2<br />
⊥<br />
2 2<br />
( 1+<br />
q ξ ) 3/ 2<br />
⊥<br />
⊥<br />
G(<br />
q)<br />
=<br />
ξ ξ ξ<br />
1 2 3<br />
2<br />
2<br />
2<br />
( 1+<br />
ξ<br />
) 2<br />
1<br />
w1q<br />
+ ξ2<br />
w2q<br />
+ ξ2<br />
w3q<br />
I~q -2 to I~q -5 I~q -4
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