Giant hall resistivity and magnetoresistance in cubic chiral antiferromagnet EuPtSi

Masashi Kakihana, Dai Aoki, Ai Nakamura, Fuminori Honda, Miho Nakashima, Yasushi Amako, Shota Nakamura, Toshiro Sakakibara, Masato Hedo, Takao Nakama, Yoshichika Ōnuki

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)


EuPtSi crystallizes in the cubic chiral structure (P213, No. 198), which is the same as the non-centrosymmetric space group of MnSi with the skyrmion structure, and orders antiferromagnetically below a Néel temperature TN = 4.05 K. The magnetization at 2 K for the [111] direction indicates two metamagnetic transitions at the magnetic fields HA1 = 9.2 kOe and HA2 = 13.8 kOe and saturates above Hc = 26.6 kOe. The present magnetic phase between HA1 and HA2 is most likely closed in the ðH; T Þ phase and is observed in a wide temperature range from 3.6 to 0.5 K. In this magnetic phase known as the A-phase, we found giant additional Hall resistivity ΔρH(H) and magnetoresistance Δρ(H), reaching ΔρH(H) = 0.12 µΩ·cm and Δρ(H) = 1.4 µΩ·cm, respectively. These findings are obtained for H ∥ [111] and [100], but not for H ∥ [110] and [112], revealing an anisotropic behavior in the new material EuPtSi.

Original languageEnglish
Article number023701
Journaljournal of the physical society of japan
Issue number2
Publication statusPublished - 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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