Compositional gradient induced enhancement of Dzyaloshinskii–Moriya interaction in Pt/Co/Ta heterostructures modulated by Pt–Co alloy intralayers
Source abstract
Abstract
The Dzyaloshinskii–Moriya interaction (DMI) is an antisymmetric exchange in magnetic structures with broken inversion symmetry. In magnetic heterostructures, the bulk DMI may coexist with the conventional interfacial DMI contributing to the chiral magnetic behavior of the system. Here, we report the enhancement of DMI in Pt/Co heterostructures wherein Pt-Co alloy intralayers with compositional gradients are sandwiched between Pt and Co. Due to the composition gradient-induced bulk magnetic asymmetry and the face-centered cubic ( fcc ) (111) multilayer crystal structure, the DMI shows a complex behavior attributed to both the interfacial (i-DMI) and bulk-like (b-DMI) contributions. While the b-DMI is defined by the presence of composition differences and structure symmetry, the i-DMI hosts the interfacial contributions in the multilayer structure. Our approach allows the creation of graded magnetic thin films, where the structural inversion symmetry is broken solely due to the predefined compositional gradient of an intralayer, thereby giving rise to an ‘all-interface-bulk’ DMI with the controllable spatial distribution.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic properties of thin films · Magnetic and transport properties of perovskites and related materials · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (54)
Show source-provided references
1. Opportunities at the frontiers of spintronics10.1103/PhysRevApplied.4.047001 ↗
2. Spin hall effects10.1103/RevModPhys.87.1213 ↗
3. Magnetic skyrmions: advances in physics and potential applications10.1038/natrevmats.2017.31 ↗
4. Interface-induced phenomena in magnetism10.1103/RevModPhys.89.025006 ↗
5. Free tuning of exchange bias via resettable alignment of antiferromagnetic Néel axes using mechanical vibrations10.1016/j.actamat.2021.116821 ↗
6. Ultralow-current magnetization switching in nearly compensated synthetic antiferromagnetic frames using sandwiched spin sources10.1016/j.actamat.2021.116708 ↗
7. Skyrmions on the track10.1038/nnano.2013.29 ↗
8. Chiral magnetic order at surfaces driven by inversion asymmetry10.1038/nature05802 ↗
9. New mechanism of anisotropic superexchange interaction10.1103/PhysRevLett.4.228 ↗
10. A thermodynamic theory of "weak" ferromagnetism of antiferromagnetics10.1016/0022-3697(58)90076-3 ↗
11. Emergent phenomena induced by spin-orbit coupling at surfaces and interfaces10.1038/nature19820 ↗
12. Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films10.1209/0295-5075/100/57002 ↗
13. Magnetic microscopy and topological stability of homochiral Néel domain walls in a Pt/Co/AlOx trilayer10.1038/ncomms9957 ↗
14. Domain wall depinning governed by the spin Hall effect10.1038/nmat3553 ↗
15. Spin orbit torques and Dzyaloshinskii-Moriya interaction in dual-interfaced Co-Ni multilayers10.1038/srep32629 ↗
16. Room-temperature chiral magnetic skyrmions in ultrathin magnetic nanostructures10.1038/nnano.2015.315 ↗
17. Hund's rule-driven Dzyaloshinskii-Moriya interaction at 3d-5d interface10.1103/PhysRevLett.117.247202 ↗
18. Higher-dimensional wannier interpolation for the modern theory of the Dzyaloshinskii–Moriya interaction: application to co-based trilayers10.7566/JPSJ.87.041010 ↗
19. Disentangling factors governing Dzyaloshinskii domain-wall creep in Co/Ni thin films using PtxIr1−x seed layers10.1103/PhysRevB.98.184410 ↗
20. The interfacial Dzyaloshinskii-Moriya interaction and spin-orbit torque driven domain wall motion in Co/Ni multilayers with a Ptx(Ir,Au)1−x seedlayer10.1063/1.5079825 ↗
21. Enhancement of spin–orbit torque and modulation of Dzyaloshinskii–Moriya interaction in Pt100-xCrx/Co/AlOx trilayer10.1063/5.0030880 ↗
22. Highly fcc-textured Pt–Al alloy films grown on MgO(001) showing enhanced spin Hall efficiency10.1063/5.0052544 ↗
23. Quantifying the Dzyaloshinskii-Moriya interaction induced by the bulk magnetic asymmetry10.1103/PhysRevLett.128.167202 ↗
24. Bulk Dzyaloshinskii-Moriya interaction in amorphous ferrimagnetic alloys10.1038/s41563-019-0380-x ↗
25. Dzyaloshinskii–Moriya interaction in noncentrosymmetric superlattices10.1038/s41524-021-00592-8 ↗
26. Observation of strong bulk damping-like spin-orbit torque in chemically disordered ferromagnetic single layers10.1002/adfm.202005201 ↗
27. Graded magnetic materials10.1088/1361-6463/abfad3 ↗
28. The influence of an ultra-high resistivity Ta underlayer on perpendicular magnetic anisotropy in Ta/Pt/Co/Pt heterostructures10.1039/D0RA00459F ↗
29. Calculating condensed matter properties using the KKR-Green's function method—recent developments and applications10.1088/0034-4885/74/9/096501 ↗
30. H. Ebert, B.L. Gyorffy, M. Battocletti, D. Benea, M. Kosuth, J. Minar, A. Perlov, V. Popescu, The Munich SPR-KKR Package, Version 7.7, 2017. https://www.ebert.cup.uni-muenchen.de/index.php/en/repository/SPRKKR/lang,en-gb/.
31. Accurate scheme to calculate the interatomic Dzyaloshinskii-Moriya interaction parameters10.1103/PhysRevB.96.104416 ↗
32. Accurate spin-dependent electron liquid correlation energies for local spin density calculations: a critical analysis10.1139/p80-159 ↗
33. Numerical methods for unconstrained optimization and nonlinear equations
34. Local spin density functional approach to the theory of exchange interactions in ferromagnetic metals and alloys10.1016/0304-8853(87)90721-9 ↗
35. Enhancement of spin transparency by interfacial alloying10.1103/PhysRevB.99.180404 ↗
36. Perpendicular magnetic anisotropy caused by interfacial hybridization via enhanced orbital moment in Co/Pt multilayers: magnetic circular X-ray dichroism study10.1103/PhysRevLett.81.5229 ↗
37. Irrelevance of magnetic proximity effect to spin-orbit torques in heavy-metal/ferromagnet bilayers10.1103/PhysRevB.98.134406 ↗
38. Magnetostatic modes of a ferromagnet slab10.1016/0022-3697(61)90041-5 ↗
39. The manipulations of surface anisotropy and interfacial Dzyaloshinskii-Moriya interaction by an amorphized oxide Ta capping layer10.1088/1361-6463/ac8b76 ↗
40. Interfacial Dzyaloshinskii-Moriya interaction in perpendicularly magnetized Pt/Co/AlOx ultrathin films measured by brillouin light spectroscopy
41. Brillouin light scattering investigation of the thickness dependence of Dzyaloshinskii-Moriya interaction in Co0.5Fe0.5 ultrathin films10.1103/PhysRevB.93.174407 ↗
42. Interfacial Dzyaloshinskii-Moriya interaction: effect of 5d band filling and correlation with spin mixing conductance10.1103/PhysRevLett.120.157204 ↗
43. Measuring and tailoring the Dzyaloshinskii-Moriya interaction in perpendicularly magnetized thin films10.1103/PhysRevB.90.020402 ↗
44. Interface control of the magnetic chirality in CoFeB/MgO heterostructures with heavy-metal underlayers10.1038/ncomms5655 ↗
45. Direct measurement of interfacial Dzyaloshinskii-Moriya interaction in X|CoFeB|MgO heterostructures with a scanning NV magnetometer (X=Ta,TaN, and W)10.1103/PhysRevB.94.064413 ↗
46. Modification of Dzyaloshinskii-Moriya-interaction-stabilized domain wall chirality by driving currents10.1103/PhysRevLett.121.147203 ↗
47. Zhores” — petaflops supercomputer for data-driven modeling, machine learning and artificial intelligence installed in Skolkovo institute of science and technology10.1515/eng-2019-0059 ↗
48. Theory of helical magnetic structures and phase transitions in MnSi and FeGe10.1088/0022-3719/13/31/002 ↗
49. Themodynamically stable magnetic vortex states in magnetic crystals10.1016/0304-8853(94)90046-9 ↗
50. Quantifying the bulk and interfacial Dzyaloshinskii-Moriya interactions
51. Magnetic properties of X–Pt (X = Fe,Co,Ni) alloy systems10.1088/0953-8984/16/13/012 ↗
52. Anisotropic exchange coupling in diluted magnetic semiconductors: ab initio spin-density functional theory10.1103/PhysRevB.79.045209 ↗
53. Berry phase theory of Dzyaloshinskii-Moriya interaction and spin-orbit torques10.1088/0953-8984/26/10/104202 ↗
54. Spin-orbit torques in Co/Pt(111) and Mn/W(001) magnetic bilayers from first principles10.1103/PhysRevB.90.174423 ↗