(Hall Effect)*

PN

*

?

Edwin H. Hall 1879

()

*

*

*

P()P

(B) (Al) (Ga) (In) *

NN

(P) (As) (Sb)

*

P()

*

y

A1A2xZ

Z FeqE

FB=FE qvBqE E=vB

*

*

-----()*SHIFT

*

*N SN()

N()

B-V

(F.W BELL) SN*