La lecture en ligne est gratuite
Read Download

Share this publication

of
and
zur
des
(Dr.
nat.)
be
i
c
r
e
on
Jark
Juli
ysik
haften"
Elena
Dissertation
oren
rer.
h
Naturwissensc
Univ
at
v
v
orgelegt
Hydro
oderation
Ph
F
Russ.
F
ersit
h
Duisburg-Essen
ferronematics
geb
Grades
\Doktor
der
o
Erlangung
v
a
dynamics
der
2003
azan,
Ry
in
Essen
Standort
ac
am
ferrogelsDr.
Dr.
m
2003
ter:
h
Graham
H.
10
Prof.
ag
Pleiner
Juli
Prof.
undlic
Gutac
ufung:
R.
T

Pr
hen
derstable
ter-
the
It
be
r
that
be
of
slo
wly
is
a
w
is
not
on
the
be
n
e
en
tional
wa
n
That
with
sp
on
has
be
n
e
liquid
to
order
it
could
be
wn
that
from
an
with
bo
h
t
yp
es
of
but
no
be
The
be
or
In
the
out
and
at
elds
In
be
h
a
and
no
for
be
n
e
ts
wo
r
the
to
the
(re-
of
uc
the
the
its
of
uc
at
all,
Here
onse
.
either
new,
hases
mainly
sup
dynamic,
the
features
susceptibilit
of
of
h
at
h
sually
ferronematics.
parameters
y
with
mak
to
es
where
a
e
n
erimen
um
erparamagnetic)
susceptibilit
ell
agnetic
the
of
v
theoretical
are
predictions
temp
for
and
qualitativ
phase
ely
the
new
via
eects
lw
m
smeared
can
eld
enhanced
lar.
tested
orn
exp
ex-
erimen
,
tally
Some
.
t
The
t
metho
already
d
ynamics
used
in
is
sho
that
dieren
their
isotropic
phenomenological
w
h
m
ydro
Quite
dynamics
this
suc
a
its
ssible.
extension
ferromagnetic
to
t
of
nematic
cause
is
relaxing,
order.
non-h
eld
ydro
high
dynamic
articles
v
ano-sized
ariables.
phase
This
w
e
a
b
but
only
v
systematically
a
macroscopic
established
b
.
consider
d
freedom
previously
in
studies
one
c
a
t
reliable
thesis
s
former,
et
that
thesis
equilibrium
direction
considered
a
dieren
ame
tial)
fourth
e
appropriate
quations
ha
that
ell
describ
w
e
ferronematic
t
w
he
stronger.
long
h
w
tration):
a
no
v
e
elength
tly
and
t
l
order.
o
del
w
magnetic
frequency
order
b
imp
e
transition
ha
to
not
can
or
to
neglected
o
uids
(sup
a
Those
nd
nematic
soft
are
matter.
ys
It
in
is
external
phenomenological
transitions
i
liquid
n
can
the
second
sense
external
that
p
parameters
of
(susceptibilities
n
and
rather
transp
to
ort
clear
co
evidence
ecien
phase
ts)
as
are
erimen
in
idea
tro

duced,
scarce.
whose
step
magnitude
of
not
h
materials
explored.
een
has
b
dynamics
a
degree
priori.
orien
Emphasis
preferred
is
dynamic
laid,
the
t
static
h
o
had
magnetization).
esting
latter
qualitativ
s
ely
f
new
t
eects.
can
First,
ecial
in
magnetization
p
to
ossible
alue
phase
b
structure
eld).
dynamics
erronematic
these
the
materials
as
the
b
are
order
ulsions
the
em
e
in
v
v
systems
estigated.
dened
on
there
v
t
these
o
that
t
ferrouids
p
d
(apart
o
and
n
one
ot
high
sho
erature
t
lo
eviden
concen
y
one
p
nematic
This
hase
magnetic
transition
(sup
and
rparamagnetic)
are
one
"sup
recen
er"-paramagnetic
.
a
y
t
magnetic
a
Within
n
mo
y
a
temp
is
erature,
large
particle
nematic
concen
seems
tration,
with
or
o
densit
uids
y
from
and
isotropic
eld
the
transition.
phase
came
get
means,
directly
there
in
magnetic
w
a
steps
a
the
(saturation)
er)paramagnetic
magnetization
phase.
f
transitions,
o
the
nuence
order
mo
built,
derate
a
or
a
lo
elds
w
dynamic
external
presence
i
an
strengths.
magnetic
No
the
ferromagnetic
are
state
crystals,
e
nematic
a
with
b
b
it
come
taneous
order.
magnetization
an
nd
magnetic
a