We report on the first observation of standing spin waves in thin evaporated Fe films by means of Raman scattering (RS). In earlier investigations using Brillouin scattering (BS) these modes could only be observed down to a thickness d≊200 Å. We were now able to extend this range down to d≊120 Å using BS and to 40 Å using RS. We find that for values of d comparable to the penetration depth of the light the scattering intensity decreases together with d. This is explained by the assumption that the scattering intensity is determined by the net magnetic moment resulting within the probing depth of the light. The mode frequencies ν observed by RS as a function of d follow very well a ν∼D*exd−2 relationship from which the value of the exchange parameter Dex has been determined.

Brillouin zone

Spin wave

Brillouin Spectroscopy

Intensity

10.1063/1.334988

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Citations (8)

Volume magnetostriction of GdBa2Cu3O7−δ

Physica C Superconductivity (1988)

J. Zieglowski S. Blumenröder A. Freimuth D. Wohlleben

10.1016/0921-4534(88)90581-3

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Citations (2)

Direct Observation of Intraionic and Interconfigurational Excitations in an Intermediate-Valence Compound by Raman Spectroscopy

Physical Review Letters (1985)

E. Zirngiebl S. Blumenröder G. Güntherodt A. Jayaraman B. Batlogg

Intraionic spin-orbit-split multiplet levels have been observed by electronic Raman scattering in the intermediate-valence compound Eu${\mathrm{Pd}}_{2}$${\mathrm{Si}}_{2}$. From the temperature dependence of the Raman peak positions and widths the interconfigurational excitation energy ${E}_{x}$ and an upper limit of the interconfigurational mixing width ${T}_{f}$, respectively, have been obtained. This is the first spectroscopic support for the underlying assumptions of the ionic interconfigurational fluctuation model that has been proposed to describe intermediate valence.

Multiplet

10.1103/physrevlett.54.213

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Citations (32)

Optical phonon anomaly in CeBe13 and Ce1-xLaxBe13

Journal of Magnetism and Magnetic Materials (1985)

S. Blumenröder E. Zirngiebl G. Güntherodt A. Jayaraman B. Batlogg

Anomaly (physics)

10.1016/0304-8853(85)90428-7

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Citations (11)

Elastic and magnetoelastic effects in CeB6