Two-Dimensional Magnetism and its Applications for Spintronic Devices
Hyun
Ho
Kim
Department
of
Chemistry
and
Institute
for
Quantum
Computing
University
of
Waterloo
Wednesday,
September
18,
2019
2:30
p.m.
C2-361
(Reading
Room)
Abstract:
The
family
of
two-dimensional
(2D)
materials
has
grown
rapidly
from semimetals
and
semiconductors
to
systems
exhibiting
collective
electronic
properties.
In
particular,
several
2D
magnetic
compounds
have recently
been
discovered.
Experimental
observations
of
the
magnetic
ground
state in
single
atomic
layers
of
such
materials
are
not
only
important
for
fundamental
interest,
but
also
technologically
relevant
for
next-generation
spintronic
devices.
In
this
talk,
I
will
present studies
of
atomically
thin
magnetic
semiconductors CrX3
(X=
Cl,
Br,
and
I)
as
well
as
their
device
applications.
By
sandwiching
CrX3 between
few-layer
graphene
electrodes,
we
are
able
to
fabricate
high-quality
van
der
Waals
magnetic
tunnel
junctions
and
electrically
probe
the
magnetic
properties
of
the
three
materials.
Moreover,
we found
that
CrI3
exhibits
an
extremely
large
tunnel
magnetoresistance
(~106%)
as
well
as
a
robust
memristive
switching
behavior
that
is
tunable
with
magnetic
field.