TY - JOUR
T1 - Magnetoelectric behaviors in magnetic-field-induced phases of Pb(TiO)Cu4(PO4)4
AU - Kimura, Kenta
AU - Kimura, Shojiro
AU - Kimura, Tsuyoshi
N1 - Funding Information:
Acknowledgment We wish to thank Y. Kato, Y. Motome, A. Miyake, M. Tokunaga, P. Babkevich, and H. M. Rønnow for helpful discussions. This work was partially supported by JSPS KAKENHI Grant Numbers JP16K05449, JP17H02917, JP17H01143, and JP19H01847 and by the MEXT Leading Initiative for Excellent Young Researchers (LEADER). This work was partly performed at the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University (Project No. 18H0014).
Publisher Copyright:
© 2019 The Physical Society of Japan.
PY - 2019
Y1 - 2019
N2 - Pb(TiO)Cu4(PO4)4, a recently found tetragonal antiferromagnet consisting of inversion asymmetric Cu4O12 square cupolas, is known to exhibit various magnetoelectric (ME) responses in a broad range of magnetic fields applied along the crystallographic [110] axis. Here, we report distinct ME responses in Pb(TiO)Cu4(PO4)4 subjected to high magnetic fields up to 18 T applied along different high-symmetric axes, namely, the a axis (Ba) and the c axis (Bc). For Ba, it is observed that a finite electric polarization emerges in a field-induced phase, whose sign is independent of the electric field cooling procedure. For Bc, while no electric polarization appears, the dielectric constant shows a sharp peak divergent toward the transition from a paramagnetic to a field-induced phase. We discuss the origin of the observed ME responses in terms of the ME activity of cluster multipole moments.
AB - Pb(TiO)Cu4(PO4)4, a recently found tetragonal antiferromagnet consisting of inversion asymmetric Cu4O12 square cupolas, is known to exhibit various magnetoelectric (ME) responses in a broad range of magnetic fields applied along the crystallographic [110] axis. Here, we report distinct ME responses in Pb(TiO)Cu4(PO4)4 subjected to high magnetic fields up to 18 T applied along different high-symmetric axes, namely, the a axis (Ba) and the c axis (Bc). For Ba, it is observed that a finite electric polarization emerges in a field-induced phase, whose sign is independent of the electric field cooling procedure. For Bc, while no electric polarization appears, the dielectric constant shows a sharp peak divergent toward the transition from a paramagnetic to a field-induced phase. We discuss the origin of the observed ME responses in terms of the ME activity of cluster multipole moments.
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U2 - 10.7566/JPSJ.88.093707
DO - 10.7566/JPSJ.88.093707
M3 - Article
AN - SCOPUS:85071259299
SN - 0031-9015
VL - 88
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 9
M1 - 093707
ER -