Ich habe mir jetzt zur Lösung des Problems einfach selber ein Kreisdiagramm in der Axis Umgebung gezeichnet. Falls jemand das gleiche Problem haben sollte poste ich meinen Code:
\documentclass[11pt,a4paper,fleqn]{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{changepage}
\usepackage{booktabs}
\usepackage{geometry}
\usepackage{hyperref}
\usepackage{ifthen}
\usepackage{todonotes}
\usepackage[ngerman]{babel}
\geometry{a4paper, top=30mm, left=30mm, right=30mm, bottom=30mm,
headsep=10mm, footskip=12mm}
\setlength\mathindent{0 cm}
\usepackage{tikz}
\usepackage{pgfplots}
\pgfplotsset{compat=newest}
\usetikzlibrary{calc,intersections,matrix,arrows,pgfplots.polar}
\usepgfplotslibrary{polar}
\begin{document}
\begin{tikzpicture}
\begin{axis}[axis equal,width=400pt,clip=false,
axis lines=middle,
hide x axis, hide y axis
]
\addplot[dotted,samples=100, domain=0:2*pi]
({cos(deg(x))}, {sin(deg(x))});
\addplot[dotted,samples=100, domain=0:2*pi]
({0.25*cos(deg(x))}, {0.25*sin(deg(x))});
\addplot[dotted,samples=100, domain=0:2*pi]
({0.5*cos(deg(x))}, {0.5*sin(deg(x))});
\addplot[dotted,samples=100, domain=0:2*pi]
({0.75*cos(deg(x))}, {0.75*sin(deg(x))});
\addplot[samples = 100,domain=0:360] ({1.1*cos(x)},{1.1*sin(x)});
\addplot [dotted,data cs=polar] coordinates{(0,0) (0,1.1)};
\addplot [dotted,data cs=polar] coordinates{(30,0) (30,1.1)};
\addplot [dotted,data cs=polar] coordinates{(60,0) (60,1.1)};
\addplot [dotted,data cs=polar] coordinates{(90,0) (90,1.1)};
\addplot [dotted,data cs=polar] coordinates{(120,0) (120,1.1)};
\addplot [dotted,data cs=polar] coordinates{(150,0) (150,1.1)};
\addplot [dotted,data cs=polar] coordinates{(180,0) (180,1.1)};
\addplot [dotted,data cs=polar] coordinates{(210,0) (210,1.1)};
\addplot [dotted,data cs=polar] coordinates{(240,0) (240,1.1)};
\addplot [dotted,data cs=polar] coordinates{(270,0) (270,1.1)};
\addplot [dotted,data cs=polar] coordinates{(300,0) (300,1.1)};
\addplot [dotted,data cs=polar] coordinates{(330,0) (330,1.1)};
\addplot [data cs=polar] coordinates{(0,1.1) (0,1.15)};
\addplot [data cs=polar] coordinates{(30,1.1) (30,1.15)};
\addplot [data cs=polar] coordinates{(60,1.1) (60,1.15)};
\addplot [data cs=polar] coordinates{(90,1.1) (90,1.15)};
\addplot [data cs=polar] coordinates{(120,1.1) (120,1.15)};
\addplot [data cs=polar] coordinates{(150,1.1) (150,1.15)};
\addplot [data cs=polar] coordinates{(180,1.1) (180,1.15)};
\addplot [data cs=polar] coordinates{(210,1.1) (210,1.15)};
\addplot [data cs=polar] coordinates{(240,1.1) (240,1.15)};
\addplot [data cs=polar] coordinates{(270,1.1) (270,1.15)};
\addplot [data cs=polar] coordinates{(300,1.1) (300,1.15)};
\addplot [data cs=polar] coordinates{(330,1.1) (330,1.15)};
\addplot [->,data cs=polar] coordinates{(0,0) (0,1.05)}
[yshift=-12pt]
node[pos=0]{$\displaystyle 0$}
node[pos=0.95]{$\displaystyle R_0$};
\node at (axis cs:{1.25*cos(0)},{1.25*sin(0)}) {$\displaystyle0$};
\node at (axis cs:{1.25*cos(30)},{1.25*sin(30)}) {$\displaystyle\frac{1}{6}\pi$};
\node at (axis cs:{1.25*cos(60)},{1.25*sin(60)}) {$\displaystyle\frac{2}{6}\pi$};
\node at (axis cs:{1.25*cos(90)},{1.25*sin(90)}) {$\displaystyle\frac{3}{6}\pi$};
\node at (axis cs:{1.25*cos(120)},{1.25*sin(120)}) {$\displaystyle\frac{4}{6}\pi$};
\node at (axis cs:{1.25*cos(150)},{1.25*sin(150)}) {$\displaystyle\frac{5}{6}\pi$};
\node at (axis cs:{1.25*cos(180)},{1.25*sin(180)}) {$\displaystyle\pi$};
\node at (axis cs:{1.25*cos(210)},{1.25*sin(210)}) {$\displaystyle1\frac{1}{6}\pi$};
\node at (axis cs:{1.25*cos(240)},{1.25*sin(240)}) {$\displaystyle1\frac{2}{6}\pi$};
\node at (axis cs:{1.25*cos(270)},{1.25*sin(270)}) {$\displaystyle1\frac{3}{6}\pi$};
\node at (axis cs:{1.25*cos(300)},{1.25*sin(300)}) {$\displaystyle1\frac{4}{6}\pi$};
\node at (axis cs:{1.25*cos(330)},{1.25*sin(330)}) {$\displaystyle1\frac{5}{6}\pi$};
\addplot[samples at={0,pi/6,...,2*pi}, variable=\t, quiver={
u={-sin(deg(t))}, v={cos(deg(t))}, scale arrows=0.2}, ->,blue]
({cos(deg(t))}, {sin(deg(t))});
\addplot[samples at={0,pi/6,...,2*pi},
variable=\t,
quiver={
u={-0.5*sin(deg(t))},
v={0.5*cos(deg(t))},
scale arrows=0.2},
->,blue]
({0.5*cos(deg(t))}, {0.5*sin(deg(t))});
\addplot[samples at={0,pi/6,...,2*pi},
variable=\t,
quiver={
u={-0.75*sin(deg(t))},
v={0.75*cos(deg(t))},
scale arrows=0.2},
->,blue]
({0.75*cos(deg(t))}, {0.75*sin(deg(t))});
\addplot[samples at={0,pi/6,...,2*pi},
variable=\t,
quiver={
u={-0.25*sin(deg(t))},
v={0.25*cos(deg(t))},
scale arrows=0.2},
->,blue]
({0.25*cos(deg(t))}, {0.25*sin(deg(t))});
\end{axis}
\end{tikzpicture}
\end{document}