TY - JOUR
T1 - Sinusoidally modulated magnetic structure of Kramers local moments in CePd 5 Al 2
AU - Onimaru, Takahiro
AU - Inoue, Yukihiro F.
AU - Ishida, Akihiro
AU - Umeo, Kazunori
AU - Oohara, Yasuaki
AU - Sato, Taku J.
AU - Adroja, Devashibhai T.
AU - Takabatake, Toshiro
N1 - Funding Information:
We would like to thank Y Isikawa, F Iga, Y Muro, Y Saiga, and K Shigetoh for helpful discussion. We also thank Y Shibata for the electron-probe microanalysis performed at N-BARD, Hiroshima University. We would also like to thank Tanaka Kikinzoku Ltd. for the supply of pure precious metal. The magnetization and magnetic resistivity measurements were carried out at N-BARD, Hiroshima University. The measurement of the electrical resistance with the PPMS was performed at N-BARD, Hiroshima University. We acknowledge support from Center for Emergent Condensed-Matter Physics (ECMP), Hiroshima University. DTA thanks JSPS for the program of Invitational Fellowship for Research in Japan. This work was supported by JSPS KAKENHI Grant Nos. JP26707017, JP15H05886 (J-Physics), JP15KK0169, JP18H01182, and JP18KK0078
Publisher Copyright:
© 2019 IOP Publishing Ltd.
PY - 2019/1/31
Y1 - 2019/1/31
N2 - The crystalline electric field (CEF) level scheme and magnetic structure of a tetragonal antiferromagnet CePd 5 Al 2 with K and K were studied by neutron scattering, magnetization and magnetoresistance measurements. Inelastic neutron scattering measurements on the powder sample revealed CEF excitations at 21.3 and 22.4 meV. The derived wave functions of the CEF ground state for the Ce 3+ ion consist primarily of under the tetragonal symmetry. By means of single-crystal neutron diffraction, magnetic Bragg peaks characterized by a propagation vector k = [δ, δ, O] were observed at T < T N1 . Our analysis indicates a sinusoidally modulated magnetic structure with amplitude of 2.0(1) μB/Ce, where the magnetic moments point to the -axis. The intensity of the third-order harmonic at 0.8 K is 1/30 as small as that expected for an antiphase structure, suggesting that the modulated structure remains at least down to 0.8 K. Both the magnetization and magnetoresistance show several anomalies in the magnetically ordered phase, indicating field-induced successive changes of the magnetic structure.
AB - The crystalline electric field (CEF) level scheme and magnetic structure of a tetragonal antiferromagnet CePd 5 Al 2 with K and K were studied by neutron scattering, magnetization and magnetoresistance measurements. Inelastic neutron scattering measurements on the powder sample revealed CEF excitations at 21.3 and 22.4 meV. The derived wave functions of the CEF ground state for the Ce 3+ ion consist primarily of under the tetragonal symmetry. By means of single-crystal neutron diffraction, magnetic Bragg peaks characterized by a propagation vector k = [δ, δ, O] were observed at T < T N1 . Our analysis indicates a sinusoidally modulated magnetic structure with amplitude of 2.0(1) μB/Ce, where the magnetic moments point to the -axis. The intensity of the third-order harmonic at 0.8 K is 1/30 as small as that expected for an antiphase structure, suggesting that the modulated structure remains at least down to 0.8 K. Both the magnetization and magnetoresistance show several anomalies in the magnetically ordered phase, indicating field-induced successive changes of the magnetic structure.
KW - antiferromagnet
KW - crystalline electric field
KW - magnetic structure
KW - neutron scattering
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U2 - 10.1088/1361-648X/aafe51
DO - 10.1088/1361-648X/aafe51
M3 - Article
C2 - 30641513
AN - SCOPUS:85061163210
SN - 0953-8984
VL - 31
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 12
M1 - 125603
ER -