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Nd 3+ and Eu 3+ doped NaNbO 3 and Na 0.5 K 0.5 NbO 3 nanostructured multiferroics (nanoparticles or nanorods) were prepared by a sol–gel route. X-Ray powder diffraction results evidence that the sodium and mixed sodium–potassium niobates show orthorhombic (Pmc2 1 space group), and monoclinic structure (Pm space group), respectively, confirmed...
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