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Search Publications by: Jeffrey W Lynn (Fed)

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Displaying 201 - 225 of 289

Fragile Antiferromagnetism in the Heavy-Fermion Compound YbBiPt

May 8, 2014
Author(s)
B. G. Ueland, A. Kreyssig, K. Prokes, Jeffrey W. Lynn, Leland Harriger, D.K. Pratt, D.K. Singh, T.W. Heitmann, S. Sauerbrei, S.M. Saunders, E. D. Mun, S. L. Bud'Ko, R.J. McQueeney, P. C. Canfield, A. I. Goldman
We report results from neutron scattering experiments on single crystals of YbBiPt that demonstrate antiferromagnetic order characterized by a propagation vector τAFM = (1/2,1/2,1/2}), and ordered moments that align along the [1 1 1] direction of the cubic

Phonon Localization Drives Polar Nanoregions in a Relaxor Ferroelectric

April 10, 2014
Author(s)
M. E. Manley, Jeffrey W. Lynn, D. L. Abernathy, E. D. Specht, O. Delaire, A. R. Bishop, R. Sahul, J. D. Budai
Relaxor Ferroelectrics 1, which are utilized as actuators and sensors 2-4, exemplify a class of poorly understood functional materials where an interplay between disorder and phase instability results in nanostructure. Foremost, there is no definitive

Magnetic Neutron Scattering

October 2, 2012
Author(s)
Jeffrey W. Lynn
Neutron scattering is a powerful tool to investigate the magnetic structures and spin dynamics of materials. In this tutorial we provide examples of the application of magnetic neutron diffraction using polycrystalline materials, single crystals, thin

Multiple Magnetic Structures of Correlated Ce-ions in Intermetallic CeAu 2 Ge 2

August 13, 2012
Author(s)
Deepak Singh, A. Thamizhavel, Jeffrey W. Lynn, S. K. Dhar, T. Hermann
Neutron diffraction measurements on a high quality single crystal of CeAu 2Ge 2 reveal two new magnetic structures that coexist with commensurate long range antiferromagnetic order below the Neel temperature T N {approximately equal} 14 K. The new magnetic

Magnetic Phase Diagram of Magnetoelectric LiMnPO 4

June 14, 2012
Author(s)
Rasmus Toft-Petersen, Niels H. Andersen, Haifeng Li, Jiying Li, Wei Tian, Sergey L. Bud'ko, Thomas B. S. Jensen, Christof Niedermayer, Mark Laver, Oksana Zaharko, Jeffrey W. Lynn, David Vaknin
The nature of the spin-flop (SF) transition in the magnetoelectric quasi-2D Heisenberg system LiMnPO 4 is studied in fields applied along the a axis. A refinement of the magnetic structure using neutron diffraction data in the SF phase reveals that the

Coexistence and Competition of the Short-Range Incommensurate Antiferromagnetic Order with Superconductivity in BaFe 2-x Ni x As 2

June 12, 2012
Author(s)
Huiqian Luo, Rui Zhang, Mark Laver, Zahra Yamani, Meng Wang, Xingye Lu, Miaoyin Wang, Yanchao Chen, Shiliang Li, Sung Chang, Jeffrey W. Lynn, Pengcheng Dai
Superconductivity in the iron pnictide develops near antiferromagnetism, and the antiferromagnetic (Af) phase appears to overlap with the superconducting phase in some materials such as BaFe 2-x(Co,NI) xAs 2. Here we use neutron scattering to demonstrate

Paramagnetic Spin Correlations in Colossal Magnetoresistive La 0.7 Ca 0.3 MnO 3

April 2, 2012
Author(s)
Joel Helton, Matthew B. Stone, Dmitry A. Shulyatev, Yakov M. Mukovskii, Jeffrey W. Lynn
Neutron spectroscopy measurements reveal dynamic spin correlations throughout the Brillouin zone in the colossal magnetoresistive system La 0.7Ca 0.3MnO 3 at 265 K ({approx}1.03T c). The long-wavelength behavior is consistent with spin diffusion, yet an

Interplay Between the Magnetic and Electric Degrees of Freedom in Multiferroic Co 3 TeO 6

March 28, 2012
Author(s)
Wen-Hsien Li, Chin-Wei Wang, Daniel Hsu, Chi-Hung Lee, Chun-Ming Wu, Chih-Chieh Chou, Hung-Duen Yang, Yang Zhao, Sung Chang, Jeffrey W. Lynn, Helmuth Berger
Neutron diffraction, magnetic susceptibility, specific heat, and dielectric constant measurements of single crystal Co 3TeO 6 have been measured to study the interplay between the ferroelectricy and magnetic order. Long range incommensurate magnetic order

Structural Collapse and Superconductivity in Rare-Earth-Doped CaFe 2 As 2

January 13, 2012
Author(s)
S. R. Saha, N. P. Butch, T. Drye, J. Magill, S. Ziemak, K. Kirshenbaum, P. Y. Zavalij, Jeffrey W. Lynn, J. Paglione
The interplay between structural, magnetic and superconducting properties in the newly discovered iron-based superconducting compounds has been a central theme in attempts to elucidate the nature of Cooper pairing in this new family of high-temperature

Evolution of the Commensurate and Incommensurate Magnetic phases of the S{/I= {3/2} Kagome Staircase Co 3 V 2 O 8 in a Applied Field

December 8, 2011
Author(s)
Joel Helton, Georgii L. Bychkov, Sergei N. Barilo, Nyrissa Rogado, Robert J. Cava, Jeffrey W. Lynn
Single crystal neutron diffraction studies have been performed on the S = {3/2} kagome staircase compound Co 3V 2O 8 with a magnetic field applied along the magnetization easy-axis (H || a). Previous zero field measurements [Y. Chen, et al., Phys. Rev. B

Quantum Spin Fluctuations in the Spin Liquid State of Tb 2 Ti 2 O^d7&

December 7, 2011
Author(s)
Hiroshi Takatsu, Hiroaki Kadowaki, Taku J. Sato, Yohiikazu Tabata, Jeffrey W. Lynn, Teruo Yamazaki, Kazuyuki Matsuhira
Neutron scattering experiments on a polycrystalline sample of the frustrated pyrochlore magnet Tb 2Ti 2O 7, which does not show any magnetic order down to 50 mK, have revealed that it shows condensation behavior below 0.4 K from a thermally fluctuationg