TABLE II.

Comparison of electromechanical coupling factor $k_{\text{ij}}$ and piezoelectric coefficient $d_{\text{ij}}$(pC/N) for “2R” domain engineered PIN-PMN-PT:Mn, PIN-PMN-PMN, and PMN-PT crystals.

	$d_{15}$ (pC/N)	$d_{24}$ (pC/N)	$d_{31}$ (pC/N)	$d_{32}$ (pC/N)	$d_{33}$ (pC/N)	$k_{15}$	$k_{24}$		$k_{31}$	$k_{32}$	$k_{33}$	$k_t$
2R (A) a	2030	125	455	−1200	810	0.90	0.32	0.64		0.86	0.86	0.45
2R (B) a	2986	160	608	−1508	1053	0.92	0.34	0.71		0.90	0.90	0.46
PIN-PMN-28%PT b	2203	114	460	−1156	782	0.90	0.30	0.67		0.86	0.87	0.49
PIN-PMN-32%PT b	3354	162	744	−1781	1363	0.95	0.36	0.75		0.90	0.92	0.50
PMN-28%PT c	2816	234	723	−1761	1766	0.90	0.30	0.65		0.89	0.91	0.50
PMN-30%PT c	3262	289	813	−2116	1916	0.95	0.36	0.71		0.94	0.92	0.52

^aThis work.

^bReference ¹⁹.

^cReference ²⁰.