ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We have carried out at 4-K spin-echo studies (of 55Mn, 63Cu) on sputtered Heusler alloy (Cu2MnAl) films with substrate temperature Ts in the range of 50–300 °C in order to obtain microscopic information on the magnetic structure. For Ts =60 °C a very broad spectrum is obtained, revealing incomplete (disordered) formation of Cu2MnAl. For Ts =158, 167, 170, and 210 °C, well-defined spectra are observed with Mn at 227 MHz and Cu at 241 and 259 MHz, respectively. Signal intensity studies reveal a maximum for Ts =167 °C in general agreement with the magnetization results of Morisako, Matsumoto, and Naoe. The signal frequencies are also in agreement with those obtained for the bulk alloy. For Ts =300 °C, the spectrum is broadened but the signal frequencies of Mn and Cu remain practically the same. This spectrum is also quantitatively different from that observed for the film with Ts=60 °C, where a low-frequency tail is observed. The effect of post-annealing the films is also presented.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.340514
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