Handbook of Nanomagnetism

July 2, 2015 17:33 PSP Book - 9in x 6in 10-Nanomagnetism-c10

262 Spin-Polarized Scanning Tunneling Microscopy

Figure 10.7 A representative scanning tunneling microscopy image of η



-

Mn

3

N

2

surface taken with a nonmagnetic tip. V =−0.3V; I = 0.12nA

Bright rows correspond to the N vacancy rows on the surface. The 90

◦

turn

in the row directions indicates a domain boundary that extends through

different layers.

6.07

˚

A. At the negative biases, the local electron densities of the

Mn atoms, which are not in the N vacancy rows, are lower than the

ones in the N vacancy rows and are difficult to resolve in scanning

tunneling microscopy images unless an extremely sharp ...