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2 results on '"Pnictides and chalcogenides"'

1. Successive Magnetic Transitions in RECoAsO.

Author

Sugiyama, Jun, Mansson, Martin, Kamazawa, Kazuya, Harada, Masashi, Ofer, Oren, Andreica, Daniel, Amato, Alex, Brewer, Jess H., Ansaldo, Eduardo J., Ohta, Hiroto, Michioka, Chishiro, and Yoshimura, Kazuyoshi

Subjects
PHASE transitions, ARSENIDES, MAGNETIC fields, RELAXATION phenomena, SPECTRUM analysis, MAGNETIZATION measurement, ANTIFERROMAGNETISM
Abstract

Abstract: In order to elucidate the details of successive magnetic transitions in the rare earth cobalt arsenic oxides (RECoAsO), we have measured muon-spin rotation and relaxation(μ +SR) spectra of powder samples with RE = La, Ce, Pr, Nd, Sm, and Gd. Together with the result of magnetization measurements, it was found that all the compounds enter into abulk static ferromagnetic ordered phase below around 70 K(=T C). Furthermore, additional transitions into a static antiferromagnetic ordered phase were found for the RE = Nd, Sm, and Gd compounds; namely T N1 = 15 K and T N2 = 7 K for Nd, T N1 = 41.5 K and T N2 = 17.5 K for Sm, and T N = 3K for Gd. [Copyright &y& Elsevier]

Published
2012
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2. Successive Magnetic Transitions in RECoAsO

Author

Kazuya Kamazawa, Anthony A. Amato, Jess H. Brewer, Chishiro Michioka, Eduardo J. Ansaldo, Hiroto Ohta, Martin Månsson, Oren Ofer, Jun Sugiyama, Kazuyoshi Yoshimura, Daniel Andreica, and Masashi Harada

Subjects
Muon-spin rotation and relaxation, Materials science, Condensed matter physics, Other ferromagnetic metals and alloys, Relaxation (NMR), chemistry.chemical_element, Pnictides and chalcogenides, Physics and Astronomy(all), Antiferromagnetics, 010402 general chemistry, 01 natural sciences, Spectral line, 0104 chemical sciences, Crystallography, Magnetization, chemistry, Ferromagnetism, Phase (matter), 0103 physical sciences, Antiferromagnetism, 010306 general physics, Cobalt, Arsenic
Abstract

In order to elucidate the details of successive magnetic transitions in the rare earth cobalt arsenic oxides ( RE CoAsO), we have measured muon-spin rotation and relaxation( μ + SR) spectra of powder samples with RE = La, Ce, Pr, Nd, Sm, and Gd. Together with the result of magnetization measurements, it was found that all the compounds enter into abulk static ferromagnetic ordered phase below around 70 K(= T C ). Furthermore, additional transitions into a static antiferromagnetic ordered phase were found for the RE = Nd, Sm, and Gd compounds; namely T N1 = 15 K and T N2 = 7 K for Nd, T N1 = 41.5 K and T N2 = 17.5 K for Sm, and T N = 3K for Gd.

Published
2012

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