Study on the oxygen isotope effect in A-site ordered manganite $R$BaMn${}_2$O${}_6$ ($R$ = La, Pr, Nd, Sm)

G. Y. Wang, K. H. Wong, Y. Wang

A-site ordered manganites $R$BaMn${}_2$O${}_6$ ($R$ = La, Pr, Nd, Sm) were synthesized and the oxygen isotope effect in them was studied. It was found that the substitution of $^{1…