Paramagnetic materials are substances that are attracted to magnetic fields. This occurs because they have unpaired electrons, which create a magnetic moment. When placed in a magnetic field, these materials align their magnetic moments with the field, resulting in a weak attraction. Unlike ferromagnetic materials, which can retain magnetization, paramagnetic materials do not hold onto their magnetism once the external magnetic field is removed. Common examples of paramagnetic substances include aluminum, oxygen, and certain metal ions. Their magnetic properties are typically weak and only noticeable in the presence of a strong magnetic field.