Using libertine Sans Serif font along with LaTeX typewriter default font

Question

How can I use the default LaTeX typewriter font along with a Sans Serif libertine font?

\documentclass{article}
\usepackage[margin=1in,headheight=5\baselineskip,headsep=1\baselineskip,includehead]{geometry}


\usepackage[scaled]{libertine} 
\renewcommand*\familydefault{\sfdefault}
\usepackage[T1]{fontenc}

\usepackage{sectsty} 
\sectionfont{\sc\sectionrule{0pt}{0pt}{-5pt}{0.5pt}}

\usepackage{lipsum}

\usepackage{fancyhdr}
\pagestyle{fancy}
\lhead{test1}
\chead{test2}
\rhead{\texttt{[email protected]}}

\begin{document}
\section*{My Section Heading}
\lipsum

\end{document}

The typewriter font in the output PDF does not match with the rest of the document and actually looks weird, as shown in the following picture (a magnified version of the picture is also illustrated).

Answer 1

You just need to add the option mono=false (or tt=false) to

\usepackage[scaled, mono=false]{libertine} 

This is described at the libertine documentation:

Use the mono=false (or tt=false) option to suppress activating LibertineMono.