Electronically Mediated Magnetic Anisotropy in Vibrating Magnetic Molecules

• We address the electronically induced anisotropy field acting on a spin moment comprised in a vibratingmagnetic molecule located in the junction between ferromagnetic metals. Under weak coupling between theelectrons and molecular vibrations, the nature of the anisotropy can be changed from favoring a high spin (easyaxis) magnetic moment to a low spin (easy plane) by applying a temperature difference or a voltage bias acrossthe junction. For unequal spin-polarizations in the ferromagnetic metals it is shown that the character of theanisotropy is essentially determined by the properties of the weaker ferromagnet. By increasing the temperaturein this metal, or introducing a voltage bias, its influence can be suppressed such that the dominant contributionto the anisotropy is interchanged to the stronger ferromagnet. With increasing coupling strength between themolecular vibrations and the electrons, the nature of the anisotropy is locked into favoring easy plane magnetis

Subject headings

NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

Keyword

Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik

Physics with spec. in Atomic, Molecular and Condensed Matter Physics

Publication and Content Type

ref (subject category)

art (subject category)