\documentclass[a4paper]{article}

\usepackage{pgfplots}

\begin{document}

\begin{tikzpicture}
	\begin{axis}[
		xmin=1e4/2,
		xmax=1e5/2,
		ymin=1e4*pi,
		ymax=1e5*pi,
	]
	\end{axis}
\end{tikzpicture}

\begin{tikzpicture}
	\begin{loglogaxis}[
		xmin=1e4/2,
		xmax=1e5/2,
		ymin=1e4*pi,
		ymax=1e5*pi,
	]
	\end{loglogaxis}
\end{tikzpicture}
\end{document}

