Negative thermal expansion and antiferromagnetism in the actinide oxypnictide N.sub.p./sub.FeAsO

0384229 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
Klimczuk, T. - Walker, H.C. - Springell, R. - Shick, Alexander - Hill, A.H. - Gaczyński, P. - Gofryk, K. - Kimber, S.A.J. - Ritter, C. - Colineau, E. - Griveau, J.C. - Bouexiere, D. - Eloirdi, R. - Cava, R.J. - Caciuffo, R.
Negative thermal expansion and antiferromagnetism in the actinide oxypnictide N_pFeAsO.
Physical Review. B. Roč. 85, č. 17 (2012), "174506-1"-"174506-10". ISSN 1098-0121
Grant CEP: GA ČR(CZ) GAP204/10/0330; GA AV ČR IAA100100912
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: magnetic materials * neutron scattering * electronic structure
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.767, rok: 2012
http://link.aps.org/doi/10.1103/PhysRevB.85.174506

A neptunium analog of the LaFeAsO tetragonal layered compound has been synthesized and characterized by a variety of experimental techniques. The occurrence of long-range magnetic order below a critical temperature TN = 57 K is suggested by anomalies in the temperature-dependent magnetic susceptibility, electrical resistivity, Hall coefficient, and specific-heat curves. First-principles electronic structure calculations based on the local spin density plus Coulomb interaction and the local density plus Hubbard-I approximations provide results in good agreement with the experimental findings.
Trvalý link: http://hdl.handle.net/11104/0213941