Muon Spin Relaxation and Electron/Neutron Diffraction Studies of BaTi2(As1-xSbx)2O: Absence of Static Magnetism and Superlattice Reflections

Published

December 6, 2013

Author(s)

Y. Nozaki, K. Nakano, T. Yajima, H. Kageyama, B. Frandsen, L Liu, S. Cheung, T. Goko, Y. J. Uemura, T.S.J. Munsie, T. Medina, G. M. Luke, J. Munevar, D. Nishio-Hamane, Craig Brown

Abstract

We present the results of muon spin relaxation/rotation, transmission electron microscopy, and neutron diffraction measurements performed on several specimens of BaTi₂(As_1-xSb_x)₂O, which is known to have either charge density or spin density wave ordering at a temperature T_DW, for all x, and superconductivity below a critical temperature T_c ≅1 K for x = 1. Zero-field muon spin relaxation measurements show no significant increase in relaxation rate at the density wave ordering temperature for any composition, indicating that the density wave is of the charge rather than spin type. The absence of any superstructure peaks in high-resolution electron and neutron diffraction below T_DW suggests that the charge density wave does not involve modulation of atomic arrangement. Transverse field muon spin rotation measurements reveal a robust superconducting state below T_c ≅ 1 K for x = 1.

Citation

Physical Review B

Volume

88

Issue

21

Pub Type

Journals

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Keywords

neutron diffraction , magnetism, muon

Citation

Nozaki, Y. , Nakano, K. , Yajima, T. , Kageyama, H. , Frandsen, B. , Liu, L. , Cheung, S. , Goko, T. , Uemura, Y. , Munsie, T. , Medina, T. , Luke, G. , Munevar, J. , Nishio-Hamane, D. and Brown, C. (2013), Muon Spin Relaxation and Electron/Neutron Diffraction Studies of BaTi₂(As_1-xSb_x)₂O: Absence of Static Magnetism and Superlattice Reflections, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=914949 (Accessed July 18, 2024)