Origin of the Magnetic Proximity Effect

Abstract

The magnetic proximity effect (MPE) has attracted the attention of theorists and experimentalists for at least three decades. Lately, the relevance of the effect for the development of nanodevices has revived interest on the subject. Here we review how the field has evolved, centering our attention on metal-metal and metal-insulator systems. We describe, and critically compare, the different theoretical approaches that have been put forward, as well as their limitations. An evaluation of the relationship between existing theories and available experimental results is also attempted.BEST AVAILABLE COPY

Neutron scattering studies of nanomagnetism and artificially structured materials

“…A question germane to the magnetic proximity effect concerns induced magnetic order in nominally nonmagnetic materials when placed in contact (proximity) with a magnetic material [116]. For example, easily polarizable materials, such as Pd (i.e., materials that are almost ferromagnetic), could acquire a magnetic moment if they are in contact with a ferromagnetic material.…”

Magnetic proximity effect in Pr0.5Ca0.5MnO3/La0.7Sr0.3MnO3 bilayered films

“…On the other hand, the development of hybrid devices based on multilayered films needs detailed information on the mutual influence between constituent layers. This influence is generally referred to as a magnetic proximity effect [1], similar to a well-known proximity effect, which is typical for superconductors. One of a principal effect provided by the magnetic coupling between the FM and the AFM layers is manifested by a shift of the hysteresis loop along the field axis of a ferromagnet, and is termed as the exchange bias interaction [2,3].…”

Emergent Multifunctional Magnetic Proximity in van der Waals Layered Heterostructures

“…The synergistic interfacial engineering of material functionalities through spin statistics and dynamics emerged by magnetic proximity or proximitized magnetism includes i) control of spin and subsequent enhancement of magnetism, [ 9,12,21 ] exchange bias, [ 7–9,11,17,22–27 ] charge transfer, [ 7,28–37 ] and spin torque, [ 38–42 ] ii) control of spin currents [ 7,28,30,43–54 ] and (noncollinear) spin structures in real space, [ 55–62 ] iii) superconductivity‐mediated control of spin (spin supercurrent and magnons), [ 4,44,63 ] and iv) generation of quasiparticles such as Majorana and skyrmions [ 40,64–69 ] ( Figure ). These efforts are crucial for forming the “bits” in next generation spintronics, valleytronics, magnonics, and topological quantum computing.…”

“…[55][56][57][58][59][60][61][62] Superconductivity-mediated spin-control (spin supercurrent and magnons) [4,44,63] and quasiparticle-generation (Majorana and skyrmions). [64][65][66][67][68] bias, [7][8][9]11,17,[22][23][24][25][26][27] charge transfer, [7,[28][29][30][31][32][33][34][35][36][37] and spin torque, [38][39][40][41][42] ii) control of spin currents [7,28,30,[43][44][45][46][47]…”