On the existence of long-range magnetic order in two-dimensional easy-plane magnets

1998 ◽  
Vol 24 (11) ◽  
pp. 823-830 ◽  
Author(s):  
B. A. Ivanov ◽  
E. V. Tartakovskaya
Keyword(s):  
Long Range ◽  
Magnetic Order ◽  
Easy Plane ◽  
Two Dimensional ◽  
Range Magnetic Order ◽  
Long Range Magnetic Order

Long-Range Magnetic Order in Oxide Quantum Wells Hosting Two-Dimensional Electron Gases

2020 ◽  
Vol 12 (25) ◽  
pp. 28775-28782
Author(s):  
Jine Zhang ◽  
Hui Zhang ◽  
Hongrui Zhang ◽  
Yang Ma ◽  
Xiaobing Chen ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Long Range ◽  
Magnetic Order ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Electron Gases ◽  
Range Magnetic Order ◽  
Long Range Magnetic Order

scholarly journals Unconventional Hall effect and its variation with Co-doping in van der Waals Fe3GeTe2

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Rajeswari Roy Chowdhury ◽  
Samik DuttaGupta ◽  
Chandan Patra ◽  
Oleg A. Tretiakov ◽  
Sudarshan Sharma ◽  
...  
Keyword(s):  
Hall Effect ◽  
Magnetic Materials ◽  
Long Range ◽  
Magnetic Order ◽  
Van Der Waals ◽  
Two Dimensional ◽  
Spintronic Devices ◽  
Co Doping ◽  
Range Magnetic Order ◽  
Long Range Magnetic Order

AbstractTwo-dimensional (2D) van der Waals (vdW) magnetic materials have attracted a lot of attention owing to the stabilization of long range magnetic order down to atomic dimensions, and the prospect of novel spintronic devices with unique functionalities. The clarification of the magnetoresistive properties and its correlation to the underlying magnetic configurations is essential for 2D vdW-based spintronic devices. Here, the effect of Co-doping on the magnetic and magnetotransport properties of Fe3GeTe2 have been investigated. Magnetotransport measurements reveal an unusual Hall effect behavior whose strength was considerably modified by Co-doping and attributed to arise from the underlying complicated spin textures. The present results provide a clue to tailoring of the underlying interactions necessary for the realization of a variety of unconventional spin textures for 2D vdW FM-based spintronics.

scholarly journals Emergent long-range magnetic order in ultrathin (111)-oriented LaNiO3 films

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Margaret M. Kane ◽  
Arturas Vailionis ◽  
Lauren J. Riddiford ◽  
Apurva Mehta ◽  
Alpha T. N’Diaye ◽  
...  
Keyword(s):  
Long Range ◽  
Degrees Of Freedom ◽  
Magnetic Order ◽  
Magnetic Ordering ◽  
Anomalous Hall Effect ◽  
X Ray Diffraction ◽  
X Ray ◽  
Range Magnetic Order ◽  
Film Substrate ◽  
Long Range Magnetic Order

AbstractThe emergence of ferromagnetism in materials where the bulk phase does not show any magnetic order demonstrates that atomically precise films can stabilize distinct ground states and expands the phase space for the discovery of materials. Here, the emergence of long-range magnetic order is reported in ultrathin (111) LaNiO3 (LNO) films, where bulk LNO is paramagnetic, and the origins of this phase are explained. Transport and structural studies of LNO(111) films indicate that NiO6 octahedral distortions stabilize a magnetic insulating phase at the film/substrate interface and result in a thickness-dependent metal–insulator transition at t = 8 unit cells. Away from this interface, distortions relax and bulk-like conduction is regained. Synchrotron x-ray diffraction and dynamical x-ray diffraction simulations confirm a corresponding out-of-plane unit-cell expansion at the interface of all films. X-ray absorption spectroscopy reveals that distortion stabilizes an increased concentration of Ni2+ ions. Evidence of long-range magnetic order is found in anomalous Hall effect and magnetoresistance measurements, likely due to ferromagnetic superexchange interactions among Ni2+–Ni3+ ions. Together, these results indicate that long-range magnetic ordering and metallicity in LNO(111) films emerges from a balance among the spin, charge, lattice, and orbital degrees of freedom.

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