The energy bands and the dispersion relations of the spin waves in a ferromagnetic bilayer system

Zhou, Weina; Yun, Guohong

doi:10.1016/j.susc.2003.12.056

Cited by 9 publications

(4 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where the Landé factor g A in sublayer A is equal to g B in sublayer B, the index i represents A or B, and the parameters µ A and µ B are given in Ref. [17]. Solving Eqs.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…The results show that transverse spin waves could affect the number of the bulk modes (BM), the perfect confined modes (PCM) or the interface modes (IM) although not the total number of eigenmodes. [17] We first gave the fine structure of the energy band over the whole twodimensional Brillouin zone in the system, discussed conditions for the existence of the interface mode and analysed the oscillating behaviour of the resonantconfined spin waves in bulk modes. [18] We also found the critical mode (CM) at the critical point between BM and PCM or PCM and IM in the system, which was composed of spin waves modulated by the interface.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The phenomenon of even bulk mode variance in a ferromagnetic A–A bilayer system

2009

View full text Add to dashboard Cite

The eigenproblems of spin waves in a symmetrical ferromagnetic bilayered system with periodic boundary conditions are solved using the interface-rescaling approach (IRA). The results show that interface coupling between two sublayers would not change the excitation energy of odd bulk modes, but change excitation energy of even bulk modes. We call this peculiar phenomenon the phenomenon of even bulk mode variance (PEBMV). There are two kinds of mechanisms which cause PEBMV: phase reversal and phase translation of the magnon at the interface, corresponding, respectively, to the antiferromagnetic and ferromagnetic interface coupling cases. PEBMV embodies the selective effect of the interface on different bulk magnons.

show abstract

“…where the Landé factor g A in sublayer A is equal to g B in sublayer B, the index i represents A or B, and the parameters µ A and µ B are given in Ref. [17]. Solving Eqs.…”

Section: Theoretical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The phenomenon of even bulk mode variance in a ferromagnetic A–A bilayer system

2009

View full text Add to dashboard Cite

show abstract

“…This interest is stimulated by two main reasons: the huge progress in the fabrication technology of such structures [11] and the rich physics they exhibit. The latest is also inherited in more complicated systems such as magnetic multilayers [12][13][14] or thin-film magnonic crystals [15][16][17][18]. A particular class of phenomena is related to the parallel to the surface propagation of spin waves (in-plane propagation).…”

Section: Introductionmentioning

confidence: 99%

Propagation Effects in the Spin-Wave Spectrum of the Ferromagnetic Thin Film

Mamica

2015

Advances in Condensed Matter Physics

View full text Add to dashboard Cite

Exchange spin waves propagating in magnetic thin films exhibit some dynamic effects, that is, the effects caused solely by the wave propagation. In this paper we put our attention in four phenomena of such kind: the surface (and subsurface) localization, the collapse of the bulk band into a single energy level, the reversal of the mode order in the spin-wave spectrum, and the dynamic separation of the thin film into two subsystems. We link these effects to properties of Hamiltonian matrix elements inherited from the spatial distribution of neighboring spins with respect to the film surface. We also provide necessary conditions for the occurrence of these effects.

show abstract

“…The properties of the magnetic thin film underlie a number of effects that occur in systems such as magnetic multilayers of thin-film magnonic crystals [1][2][3][4][5]. Therefore, for more than half a century the magnetic thin film has remained the subject of keen interest, additionally stimulated by the immense progress in the measurement techniques and fabrication technology of such systems [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Dynamic effects on the spin-wave spectrum of the bcc thin film

Mamica

2014

Eur. Phys. J. B

View full text Add to dashboard Cite

Abstract. In the present paper we consider a ferromagnetic thin film with exchange interaction between nearest and next-nearest neighbours. Using a microscopic model based on the Heisenberg Hamiltonian we investigate how the propagation parallel to the surface of the film affects the spin-wave spectrum. Due to its wave-vector dependence the effective coupling between lattice planes parallel to the surface can be of ferromagnetic or antiferromagnetic character, or it can vanish completely, depending on the propagation of spin waves. When the effective coupling vanishes, the film separates into subsystems in which spin waves propagate independently. Antiferromagnetic effective coupling for certain wave vectors implies reversed mode order in the spectrum (with the optical mode at the bottom and the acoustic one at the top). Interestingly, this effect occurs also when all the exchange interactions in the considered system are ferromagnetic.

show abstract

The energy bands and the dispersion relations of the spin waves in a ferromagnetic bilayer system

Cited by 9 publications

References 33 publications

The phenomenon of even bulk mode variance in a ferromagnetic A–A bilayer system

The phenomenon of even bulk mode variance in a ferromagnetic A–A bilayer system

Propagation Effects in the Spin-Wave Spectrum of the Ferromagnetic Thin Film

Dynamic effects on the spin-wave spectrum of the bcc thin film

Contact Info

Product

Resources

About