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Iowa State University

Series

Metallurgy

Physics and Astronomy

2005

Articles 1 - 2 of 2

Full-Text Articles in Physics

Neutron Diffraction Studies Of The Magnetoelastic Compounds Tb5sixge4−X (X=2.2 And 2.5), V. O. Garlea, Jerel L. Zarestky, C. Y. Jones, L.-L. Lin, Deborah L. Schlagel, Thomas A. Lograsso, A. O. Tsokol, Vitalij K. Pecharsky, Karl A. Gschneidner Jr., C. Stassis Sep 2005

Neutron Diffraction Studies Of The Magnetoelastic Compounds Tb5sixge4−X (X=2.2 And 2.5), V. O. Garlea, Jerel L. Zarestky, C. Y. Jones, L.-L. Lin, Deborah L. Schlagel, Thomas A. Lograsso, A. O. Tsokol, Vitalij K. Pecharsky, Karl A. Gschneidner Jr., C. Stassis

Ames Laboratory Publications

We report the results of a neutron diffraction study, carried out on both single crystalline and polycrystalline samples of Tb5Si2.2Ge1.8 and polycrystalline Tb5Si2.5Ge1.5. On cooling, at approximately 120 K, the Tb5Si2.2Ge1.8 system undergoes a magnetoelastic transition from a high-temperature monoclinic-paramagnetic to a low-temperature orthorhombic-ferromagnetic structure. Between 120 K and 75 K, the magnetic structure has a net ferromagnetic component along the a axis direction. The moments are slightly canted with respect to the a axis, while the components along ...


Magnetic Structure Of Gd5ge4, L. Tan, Andreas Kreyssig, J. W. Kim, Alan I. Goldman, Robert J. Mcqueeney, D. Wermeille, B. Sieve, Thomas A. Lograsso, Deborah L. Schlagel, Sergey L. Bud'ko, Vitalij K. Pecharsky, Karl A. Gschneidner Jr. Jun 2005

Magnetic Structure Of Gd5ge4, L. Tan, Andreas Kreyssig, J. W. Kim, Alan I. Goldman, Robert J. Mcqueeney, D. Wermeille, B. Sieve, Thomas A. Lograsso, Deborah L. Schlagel, Sergey L. Bud'ko, Vitalij K. Pecharsky, Karl A. Gschneidner Jr.

Ames Laboratory Publications

Gd5Ge4 crystallizes in the orthorhombic space group Pnma, and orders antiferromagnetically below the Néel temperatureTN∼127 K. We have employed x-ray resonant magnetic scattering to elucidate the details of the magnetic structure. The magnetic unit cell is the same as the chemical unit cell. From azimuth scans and the Q dependence of the magnetic scattering, all three Gd sites in the structure were determined to be in the same magnetic space group Pnm′a. The magnetic moments are primarily aligned along the c axis and the c components of the magnetic moments at the three different ...