SURFACE-ENHANCED MAGNETIC ORDER AND CRITICAL BEHAVIOR OF Tb(0001) FILMS ON W(110)
نویسندگان
چکیده
The magnetic properties of uncoated, epitaxial Tb(0001) films on W(110) substrates are studied using electron capture spectroscopy. The topmost layer orders ferromagnetically below a surface Curie temperature Tc. = 249.96 f 0.02 K, which lies above the bulk Curie and NCI temperatures Tcb=220 K and TNb = 228 K. Near Tcs, novel critical behavior is observed, suggesting the existence of strong surface anisotropies.
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