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Fe 2 As

Predicting Magnetic Ordering in Intermetallics Gordon J. Miller, Iowa State University, DMR 0806507. Our research investigates metal-rich intermetallics that change magnetic ordering as a function of composition and structural motifs (i.e. frustration).

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Fe 2 As

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  1. Predicting Magnetic Ordering in IntermetallicsGordon J. Miller, Iowa State University, DMR 0806507 • Our research investigates metal-rich intermetallics that change magnetic ordering as a function of composition and structural motifs (i.e. frustration). • One specific class of arsenides (below), M2As, contains two distinct metal atom sites. • Different transition metals lead to different magnetic structures (right) Cr2As Mn2As Fe2As M2 • Each case shows a different magnetic structure (above; Mn, Fe are tetragonal; Cr predicted to distort – magnetoelastic) • A combination of first-principles electronic structure methods gives (1) experimental ground state structures; (2) understanding of chemical influences; (3) predicts approximate Neél temperatures with good accuracy. As M1

  2. Predicting Magnetic Ordering in IntermetallicsGordon J. Miller, Iowa State University, DMR 0806507 • During the past year the funding for research on intermetallics also: • Supports two women in science (one post-doctoral associate; one new graduate student in Materials Science). • Graduated one student (right: J. Brgoch, Ph.D.) who is now a post-doctoral scientist at U. California-Santa Barbara and will begin searching for faculty positions in 2013. • Provided an opportunity for a student of Sudanese descent (left, bottom) to complete research outside a classroom environment. Jakoah Brgoch (Iowa State, right) arriving at the Hauptbahnhof in Aachen, Germany with Christian Goerens (RWTH-Aachen, left) Yassir Mahmoud (Undergraduate) completing data analysis

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