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  Magnetic properties of (La, Gd)Al2 alloys

Löhneysen, H. v., Tholence, J. L., & Steglich, F. (1978). Magnetic properties of (La, Gd)Al2 alloys. Zeitschrift für Physik B, 29(4), 319-326. doi:10.1007/BF01324029.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-BFDE-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-BFDF-A
Genre: Journal Article

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Löhneysen, H. v.1, Author
Tholence, J. L.1, Author
Steglich, F.2, Author              
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1external, ou_persistent22              
2External Organizations, ou_persistent22              

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 Abstract: Theac anddc susceptibilities of (La1−x Gd x )Al2 alloys were measured for moderate Gd concentrations (0.01≦x≦0.08) between 0.05 and 4.2 K. Sharp spin glass like maxima inχ AC are observed at temperaturesT f which scale asT f /x ≃ 26 K for all samples. However, scaling ofχ AC is not observed indicating that the RKKY interaction at short distances which becomes more important with increasing Gd concentration, is ferromagnetic in this system. The amplitudeV 0 of the RKKY interaction is obtained from both the approach to the saturation magnetization andχ AC forT→0, yielding a mean value V¯ 0=(1.5±0.3) ⋅ 10−26 eV cm3 which is in agreement with that observed in other systems with Gd impurities. Furthermore, the inferred value of the exchange integral is in accord with other measurements (T c depression, reverse resistance anomaly) on (La, Gd)Al2. A superposeddc magnetic field rounds the maximum ofχ AC and shifts it to lower temperatures.χ AC is completely flat below 4.2 K in a field which saturates the isothermal remanent magnetization, showing once again the correlation between the peak inχ AC and the onset of irreversible properties.

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 Dates: 1978-10-01
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: ISI: A1978EW75900005
DOI: 10.1007/BF01324029
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Title: Zeitschrift für Physik B
  Other : Zeitschrift für Physik B Condensed Matter
Source Genre: Journal
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Publ. Info: Springer-Verlag
Pages: - Volume / Issue: 29 (4) Sequence Number: - Start / End Page: 319 - 326 Identifier: CoNE: /journals/resource/0722-3277