Landau energy function of strain e and normalized temperature TN = (αγ/β2)(T - T1) - 0.25, with unit cells of BaTiO3 in cubic and tetragonal phases. α, γ, and β are constants that depend on the material. Image credit: College of Engineering, University of Wisconsin-Madison

	Cross-section of composite specimen in polarized light. Barium titanate inclusions appear as black spots. The polycrystalline structure of the tin matrix is shown in grayscale. Scale bar, 500 mm. Image credit: College of Engineering, University of Wisconsin-Madison
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