| prov:value
| - In particular, CaRuO3, SrRuO3, BaRuO3, SrVO3, (La,Sr)MnO3, (La,Sr)CrO3, (La,Sr)CoO3, LaNiOx, REBa2Cu3Ox (RE=La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y) or solid solutions containing these compounds are especially desirable, and it is desirable to select at least one substance from a set comprising SrRuO3, LaNiOx, REBa2Cu3Ox (RE=La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm,
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