RT Journal Article T1 Scanning electron acoustic microscopy observations of twins and grain boundaries in III‐V materials A1 Domínguez-Adame Acosta, Francisco A1 Piqueras De Noriega, Francisco Javier AB Polycrystalline GaP and InP have been observed by scanning electron acoustic microscopy. While grain boundaries show a weak contrast, twinned regions are clearly revealed. Results suggest that the contrast observed is related to signal generation by a piezoelectric‐coupling mechanism PB American Institute of Physics SN 0021-8979 YR 1989 FD 1989-09-15 LK https://hdl.handle.net/20.500.14352/59303 UL https://hdl.handle.net/20.500.14352/59303 LA eng NO © American Institute of Physics.This work has been supported by the Volkswagen Foundation and by the Comisión Intermiisterial de Ciencia y Tecnología (Project No. PB86-0151). NO Volkswagon Foundation NO Comision Interministerial de Ciencia y Tecnología DS Docta Complutense RD 10 abr 2025