This book is intended to give an introduction and a comprehensive overview concerning the main areas of surface magnetism with special emphasis on rare earth metals. Investigations in this ?eld require experimental techniques which are sensitive to the topmost layers on the one hand and simultaneously to magnetic properties on the other hand. Using additionally tools with a high lateral resolution the visualization of magnetic domains becomes possible. Theunderstandingofmagneticandelectronicbehaviorrequirestheknowledgeof the structure on a microscopic scale. Due to this important relationship...