Téléchargement | - Voir le manuscrit accepté : Neutron Diffraction Study of the Magnetic and Structural Phase Transitions in BaFe2As2 (PDF, 597 Kio)
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Auteur | Rechercher : Wilson, Stephen D.; Rechercher : Yamani, Z.1; Rechercher : Rotundu, C. R.; Rechercher : Freelon, B.; Rechercher : Bourret-Courchesne, E.; Rechercher : Birgeneau, R. J. |
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Affiliation | - Conseil national de recherches du Canada. Centre canadien de faisceaux de neutrons du CNRC
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Format | Texte, Article |
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Résumé | We present the results of an investigation of both the magnetic and structural phase transitions in a high quality single crystalline sample of the undoped iron pnictide compound BaFe2As2. Both phase transitions are characterized via neutron diffraction measurements which reveal simultaneous, continuous magnetic and structural orderings with no evidence of hysteresis, consistent with a single second-order phase transition. The onset of long-range antiferromagnetic order can be described by a simple power-law dependenceT21−T TN 2 with=0.1030.018; a value near the=0.125 expected for a two-dimensional Ising system. Biquadratic coupling between the structural and magnetic order parameters is also inferred along with evidence of threedimensional critical scattering in this system. |
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Date de publication | 2009-05-01 |
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Dans | |
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Langue | anglais |
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Publications évaluées par des pairs | Oui |
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Numéro NPARC | 14791085 |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | 7313522f-14dd-4239-854d-ae2facf93b9c |
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Enregistrement créé | 2011-02-15 |
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Enregistrement modifié | 2020-04-16 |
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