A stator lamination for an electric machine comprising: An annular lamination face having a circular bore therethrough; the said bore having a substantially smooth edge surface; a plurality of winding slots disposed around the bore; and a plurality of slot closures disposed between the plurality of winding slots and the edge surface, wherein the stator lamination is a monolithic piece made from a single piece of a magnetic phase material, the magnetic phase material being able to be transitioned from a first state of magnetism, the first state of magnetism having a magnetic property, to a second state of magnetism, the second state of magnetism having a magnetic property, wherein the magnetic property in the second state of magnetism is different than that in the first state, the magnetic phase material in the second state of magnetism being non-magnetic or less magnetic than the magnetic phase material in the first state of magnetism, characterized in that the plurality of slot closures are further comprising a first set, a second set, and a third set of slot closures, wherein the first slot closure set is treated so as to transition to the second state of magnetism and the second slot closure set remains in the first state of magnetism, and wherein the third slot closure set is treated so as to transition to a third state of magnetism, wherein the magnetic property of the third state of magnetism is different than the magnetic property of the first state of magnetism and the second state of magnetism; the magnetic phase material in the third state of magnetism being non-magnetic or less magnetic than the magnetic phase material in the first state of magnetism, and the magnetic property of a first predetermined region of one of the plurality of slot closures, the said first predetermined region being wider than the width of the respective winding slot, differs from the magnetic property of a second predetermined region of one of the plurality of slot closures, the said second predetermined region being narrower than the width of the respective winding slot. An annular lamination face having a circular bore therethrough; the said bore having a substantially smooth edge surface; a plurality of winding slots disposed around the bore; and a plurality of slot closures disposed between the plurality of winding slots and the edge surface, wherein the stator lamination is a monolithic piece made from a single piece of a magnetic phase material, the magnetic phase material being able to be transitioned from a first state of magnetism, the first state of magnetism having a magnetic property, to a second state of magnetism, the second state of magnetism having a magnetic property, wherein the magnetic property in the second state of magnetism is different than that in the first state, the magnetic phase material in the second state of magnetism being non-magnetic or less magnetic than the magnetic phase material in the first state of magnetism, characterized in that the plurality of slot closures are further comprising a first set, a second set, and a third set of slot closures, wherein the first slot closure set is treated so as to transition to the second state of magnetism and the second slot closure set remains in the first state of magnetism, and wherein the third slot closure set is treated so as to transition to a third state of magnetism, wherein the magnetic property of the third state of magnetism is different than the magnetic property of the first state of magnetism and the second state of magnetism; the magnetic phase material in the third state of magnetism being non-magnetic or less magnetic than the magnetic phase material in the first state of magnetism, and the magnetic property of a first predetermined region of one of the plurality of slot closures, the said first predetermined region being wider than the width of the respective winding slot, differs from the magnetic property of a second predetermined region of one of the plurality of slot closures, the said second predetermined region being narrower than the width of the respective winding slot.