TY - JOUR
T1 - Anomalous spiked structures in ESR signals from the chiral helimagnet CrNb3 S6
AU - Yoshizawa, Daichi
AU - Sawada, Yuya
AU - Kousaka, Yusuke
AU - Kishine, Jun Ichiro
AU - Togawa, Yoshihiko
AU - Mito, Masaki
AU - Inoue, Katsuya
AU - Akimitsu, Jun
AU - Nakano, Takehito
AU - Nozue, Yasuo
AU - Hagiwara, Masayuki
N1 - Funding Information:
We thank K. Tsuruta at JASRI/SPring-8 for fruitful discussions. This work was partially supported by Grants-in-Aid for Scientific Research (S) Grant No. 25220803, Scientific Research (A) Grant No. 24244059, Scientific Research (A) Grant No. 25246006, Scientific Research (C) Grant No. 26400368, and Scientific Research (B) Grant No. 15H03680 all from MEXT, and by JSPS Core-to-Core Program, A. Advanced Research Network.
Publisher Copyright:
© 2019 American Physical Society.
PY - 2019/9/9
Y1 - 2019/9/9
N2 - We have performed X-band electron spin resonance (ESR) measurements on a single crystal of the metallic chiral helimagnet CrNb3S6 from 3.5 to 180 K and for the external magnetic fields Hext, up to 4 kOe, perpendicular to the c axis (the helical axis of CrNb3S6). This field-crystalline configuration is expected to provide the chiral soliton lattice (CSL) state in this system. The main resonance line can be fit with a Dysonian function above Tc=127K, but additional features in the spectra were observed below 105 K. Specifically, spiked anomalies superposed on the main signals were observed for magnetic fields between Hc1 and Hc2 that are the appearing and disappearing fields of the spiked anomalies, respectively. The resulting magnetic field vs temperature phase diagram possesses three regions, which are interpreted as different dynamical responses in the CSL phase. In addition, the values of Hc2 are close to those reported by the d2M/dH2 curve [Tsuruta, Phys. Rev. B 93, 104402 (2016)2469-995010.1103/PhysRevB.93.104402]. Furthermore, the field range between Hc1 and Hc2, where the spiked anomalies exist, depends on the field direction and shifts to higher fields when turning to the c axis, thereby providing additional evidence that these spiked anomalies must be related to the chiral soliton dynamics.
AB - We have performed X-band electron spin resonance (ESR) measurements on a single crystal of the metallic chiral helimagnet CrNb3S6 from 3.5 to 180 K and for the external magnetic fields Hext, up to 4 kOe, perpendicular to the c axis (the helical axis of CrNb3S6). This field-crystalline configuration is expected to provide the chiral soliton lattice (CSL) state in this system. The main resonance line can be fit with a Dysonian function above Tc=127K, but additional features in the spectra were observed below 105 K. Specifically, spiked anomalies superposed on the main signals were observed for magnetic fields between Hc1 and Hc2 that are the appearing and disappearing fields of the spiked anomalies, respectively. The resulting magnetic field vs temperature phase diagram possesses three regions, which are interpreted as different dynamical responses in the CSL phase. In addition, the values of Hc2 are close to those reported by the d2M/dH2 curve [Tsuruta, Phys. Rev. B 93, 104402 (2016)2469-995010.1103/PhysRevB.93.104402]. Furthermore, the field range between Hc1 and Hc2, where the spiked anomalies exist, depends on the field direction and shifts to higher fields when turning to the c axis, thereby providing additional evidence that these spiked anomalies must be related to the chiral soliton dynamics.
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U2 - 10.1103/PhysRevB.100.104413
DO - 10.1103/PhysRevB.100.104413
M3 - Article
AN - SCOPUS:85072568837
SN - 2469-9950
VL - 100
JO - Physical Review B
JF - Physical Review B
IS - 10
M1 - 104413
ER -