TY - JOUR
T1 - Giant anomalous Hall effect from spin-chirality scattering in a chiral magnet
AU - Fujishiro, Yukako
AU - Kanazawa, Naoya
AU - Kurihara, Ryosuke
AU - Ishizuka, Hiroaki
AU - Hori, Tomohiro
AU - Yasin, Fehmi Sami
AU - Yu, Xiuzhen
AU - Tsukazaki, Atsushi
AU - Ichikawa, Masakazu
AU - Kawasaki, Masashi
AU - Nagaosa, Naoto
AU - Tokunaga, Masashi
AU - Tokura, Yoshinori
N1 - Funding Information:
The authors thank A. Kitaori and M. Mogi for experimental supports and fruitful discussions. This research was supported in part by JSPS KAKENHI (Grants No. JP18J20959, No. JP20H05155, No. JP20H01859, and No. JP20H01867) and JST CREST (Grants No. JPMJCR16F1 and No. JPMJCR1874).
Publisher Copyright:
© 2021, The Author(s).
PY - 2021/12
Y1 - 2021/12
N2 - The electrical Hall effect can be significantly enhanced through the interplay of the conduction electrons with magnetism, which is known as the anomalous Hall effect (AHE). Whereas the mechanism related to band topology has been intensively studied towards energy efficient electronics, those related to electron scattering have received limited attention. Here we report the observation of giant AHE of electron-scattering origin in a chiral magnet MnGe thin film. The Hall conductivity and Hall angle, respectively, reach 40 , 000 Ω−1 cm−1 and 18 % in the ferromagnetic region, exceeding the conventional limits of AHE of intrinsic and extrinsic origins, respectively. A possible origin of the large AHE is attributed to a new type of skew-scattering via thermally excited spin-clusters with scalar spin chirality, which is corroborated by the temperature–magnetic-field profile of the AHE being sensitive to the film-thickness or magneto-crystalline anisotropy. Our results may open up a new platform to explore giant AHE responses in various systems, including frustrated magnets and thin-film heterostructures.
AB - The electrical Hall effect can be significantly enhanced through the interplay of the conduction electrons with magnetism, which is known as the anomalous Hall effect (AHE). Whereas the mechanism related to band topology has been intensively studied towards energy efficient electronics, those related to electron scattering have received limited attention. Here we report the observation of giant AHE of electron-scattering origin in a chiral magnet MnGe thin film. The Hall conductivity and Hall angle, respectively, reach 40 , 000 Ω−1 cm−1 and 18 % in the ferromagnetic region, exceeding the conventional limits of AHE of intrinsic and extrinsic origins, respectively. A possible origin of the large AHE is attributed to a new type of skew-scattering via thermally excited spin-clusters with scalar spin chirality, which is corroborated by the temperature–magnetic-field profile of the AHE being sensitive to the film-thickness or magneto-crystalline anisotropy. Our results may open up a new platform to explore giant AHE responses in various systems, including frustrated magnets and thin-film heterostructures.
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U2 - 10.1038/s41467-020-20384-w
DO - 10.1038/s41467-020-20384-w
M3 - Article
C2 - 33436576
AN - SCOPUS:85099208741
SN - 2041-1723
VL - 12
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 317
ER -