Perturbed Angular Correlation Studies of Surfaces

Key words: 
• perturbed angular correlation /
• surface physics /
• microscopic diffusion /
• Ni single crystal /
• ultrathin Ni film /
• magnetic hyperfine field

Abstract: Recently,the perturbed angular correlation (PAC) technique with the microscopicsensitivity to study local surface properties has been applied to study surface phenomena.The electricfield gradient acting at the probe nuclei can serve as a fingerprint to elucidate different probe sites atthe surface,impurity-probe configurations and diffusion of impurities.The microscopic diffusion ofPAC-probes from adatomic sites via step sites to substitutional terrace sites has been observed withPAC...