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Ferromagnetic resonance calculations in multilayers of iron and its alloys (abstract) (1987)

Lin, T. S. ; Vittoria, C.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 61 (1987), S. 4154-4154

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: We have extended previous1 calculations of ferromagnetic resonance (FMR) in magnetic alternating layered structures by including the effects of exchange coupling between layers. Whereas in previous calculations the magnetic layers were separated by a nonmagnetic layer, in this calculation all the layers are magnetic. In particular we consider the problem in which successive iron layers in the layered structure are separated by an iron alloy layer. The magnetic properties of the alloy are purposely chosen so that the ferromagnetic resonance field in the absence of any external fields due to exchange coupling between layers is close to (∼600 Oe) the iron FMR line. We find that the separation in FMR fields corresponding to the two types of layers is strongly affected by exchange coupling A12. For A12=−0.1 ergs/cm2 the separation between the lines is 384 Oe in comparison to 604 Oe for A12=0. However, for A12=0.1 ergs/cm2 both lines are shifted dramatically from the Kittel resonance conditions. This implies that FMR should be a useful technique in measuring exchange effects in multilayers structures. The calculation will be discussed in terms of recent experimental results.2

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.338510

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Superconductivity and microwave absorption (1988)

LIN, T.-S. ; SOBOTKA, L. G. ; FRONCISZ, W.

[s.l.] : Nature Publishing Group

Nature 333 (1988), S. 21-22

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ISSN: 1476-4687

Source: Nature Archives 1869 - 2009

Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics

Notes: [Auszug] SIR-Recently, Sastry et al.1 suggested that the low-field electron spin resonance (ESR) signal of YBa2Cu,O7_r superconductors observed with an X-band spectrometer could be attributed to a large zero-field splitting arising from dimerization of electrons on copper pairs in adjacent octahedra. But ...