  We propose a new efficient permanent magnet, SmCoNiFe3, that is a
breakthrough development of the well-known SmCo5 prototype. More modern
neodymium magnets of the Nd-Fe-B type have an advantage over SmCo5 because of
their greater maximum energy products due to their iron-rich stoichiometry. Our
new magnet, however, removes most of this disadvantage of SmCo5 while
preserving its superior high-temperature efficiency over the neodymium magnets.
