Tunable Magnetism in Atomically Thin Itinerant Antiferromagnet with Room-Temperature Ferromagnetic Order

Addressing the need for modulated spin configurations is crucial, as they serve as the foundational building blocks for next-generation spintronics, particularly in atomically thin structures and at room temperature. In this work, we realize intrinsic ferromagnetism in monolayer flakes and tunable ferro-/antiferromagnetism in (Fe0.56Co0.44)5GeTe2 antiferromagnets. Remarkably, the ferromagnetic ordering (≥1 L) and antiferromagnetic ordering (≥4 L) remain discernible up to room temperature. The TC (∼310 K) of the monolayer flakes sets a record high for known exfoliated monolayer van der Waals magnets. Within the framework of A-type antiferromagnetism, a notable odd-even layer-number effect at elevated temperatures (T = 150 K) is observed. Of particular interest is the strong ferromagnetic order in even-layer flakes at low temperatures. The intricate interplay among magnetic field strength, layer number, and temperature gives rise to a diverse array of phenomena, holding promise not only for new physics but also for practical applications.

Wang, QingUniversity of Science and Technology of China (författare)
Duan, HengliPaul Scherrer Institute,University of Science and Technology of China (författare)
Zhu, KejiaAnhui university (författare)
Hu, TaoAnhui university (författare)
Ma, YupengAnhui university (författare)
Shen, ShengchunUniversity of Science and Technology of China (författare)
Niu, YuranLund University,Lunds universitet,MAX IV, MAXPEEM,MAX IV, Imaging,MAX IV, Vetenskapsavdelning,MAX IV-laboratoriet,MAX IV, MAXPEEM,MAX IV, Imaging,MAX IV, Science division,MAX IV Laboratory(Swepub:lu)maxl-yun (författare)
Liu, JiatuLund University,Lunds universitet,MAX IV, Diffraction and scattering,MAX IV, Vetenskapsavdelning,MAX IV-laboratoriet,MAX IV, Diffraction and scattering,MAX IV, Science division,MAX IV Laboratory(Swepub:lu)ji2528li (författare)
Wang, JianlinUniversity of Science and Technology of China (författare)
Ekahana, Sandy AdhitiaPaul Scherrer Institute (författare)
Dreiser, JanPaul Scherrer Institute (författare)
Soh, Y.Paul Scherrer Institute (författare)
Yan, WenshengUniversity of Science and Technology of China (författare)
Wang, GuopengAnhui university (författare)
Xiong, YiminAnhui university (författare)
Hao, NingUniversity of the Chinese Academy of Sciences (författare)
Lu, YalinUniversity of Science and Technology of China (författare)
Tian, MingliangAnhui university (författare)
Anhui universityUniversity of Science and Technology of China (creator_code:org_t)

Av författaren/redakt...: Lu, Longyu; Wang, Qing; Duan, Hengli; Zhu, Kejia; Hu, Tao; Ma, Yupeng; visa fler...; Shen, Shengchun; Niu, Yuran; Liu, Jiatu; Wang, Jianlin; Ekahana, Sandy A ...; Dreiser, Jan; Soh, Y.; Yan, Wensheng; Wang, Guopeng; Xiong, Yimin; Hao, Ning; Lu, Yalin; Tian, Mingliang; visa färre...

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