title: Europium nitride: a novel diluted magnetic semiconductor.
abstract: Europium nitride is semiconducting and contains nonmagnetic Eu3+, but substoichiometric EuN has Eu in a mix of 2+ and 3+ charge states. We show that at Eu2+ concentrations near 15%-20% EuN is ferromagnetic with a Curie temperature as high as 120 K. The Eu3+ polarization follows that of the Eu2+, confirming that the ferromagnetism is intrinsic to the EuN which is, thus, a novel diluted magnetic semiconductor. Transport measurements shed light on the likely exchange mechanisms.
authors.affiliation: The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand.
authors.forename: Do
authors.initials: D
authors.lastname: Le Binh
authors.forename: B J
authors.initials: BJ
authors.lastname: Ruck
authors.forename: F
authors.initials: F
authors.lastname: Natali
authors.forename: H
authors.initials: H
authors.lastname: Warring
authors.forename: H J
authors.initials: HJ
authors.lastname: Trodahl
authors.forename: E-M
authors.initials: EM
authors.lastname: Anton
authors.forename: C
authors.initials: C
authors.lastname: Meyer
authors.forename: L
authors.initials: L
authors.lastname: Ranno
authors.forename: F
authors.initials: F
authors.lastname: Wilhelm
authors.forename: A
authors.initials: A
authors.lastname: Rogalev