Electrical resistivity of antiferromagnetic chromium near the Néel temperature
1978; American Physical Society; Volume: 18; Issue: 7 Linguagem: Inglês
10.1103/physrevb.18.3665
ISSN1095-3795
AutoresÖ. Rapp, G Benediktsson, H. U. Åström, Sigurds Arajs, K. V. Rao,
Tópico(s)Advanced Condensed Matter Physics
ResumoPrecision electrical-resistivity measurements around the N\'eel temperature, ${T}_{N}$, of three samples of polycrystalline chromium with different thermal histories are reported. The critical exponent of $\frac{d\ensuremath{\rho}}{\mathrm{dT}}$ below ${T}_{N}$ is found to be 0.65 \ifmmode\pm\else\textpm\fi{} 0.05 over temperature ranges that are sample dependent. Thus, the Suezaki-Mori theory for the resistivity of an antiferromagnet predicting the dominant behavior below ${T}_{N}$ is confirmed. However, above ${T}_{N}$, our data cannot be fit into any meaningful power law.
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