# Material: definition (structure)

## Definition

A material is defined by:

• a name (and comment)
• its resistivity
• possibly its relative permeability

## Name

The name to identify the material is set by the user during the creation of this one.

A comment (optional) can be added to the name.

## Resistivity

The resistivity is in Ω.m.

## Relative permeability

The relative permeability µr has no unit of measurement.