Abstract
We have investigated the Fermi surface (FS) and magnetic properties of rare-earth monopnictide TbSb by means of de Haas--van Alphen (dHvA) and high-field magnetization measurements, respectively. The clear dHvA oscillation and spin splitting of the FS were observed. The present result indicates that the determined FS is quite similar to that of LaSb, i.e., TbSb is expected to be a well localized $4f$-electron system. By analyzing the spin splitting of the FS, the exchange interaction between conduction electrons and localized $4f$ ones was estimated quantitatively. It was found that these evaluated values were similar in magnitude to other important ones such as crystalline electric-field effect and exchange and quadrupolar interactions among $4f$ electrons in TbSb. This experimental fact ensures that their interactions are comparable to one another, leading to the fact that the physical properties are sensitive to external variables such as magnetic field in this system.
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