Magnetotransport properties of heavy-fermion ferromagnet YbPtGe

Kenichi Katoh, Takaaki Koga, Giichi Terui, Akira Ochiai

研究成果: Article査読

11 被引用数 (Scopus)


The transverse magnetoresistivity ρH, Hall coefficient RH, and specific heat C for H ∥ a below 10kOe for the moderate heavy-fermion ferromagnet YbPtGe with the Curie-temperature TC = 5.4 K are reported. It is observed that the ρH(T) values for the currents along the three crystallographic axes markedly decrease below 30 K with increasing applied magnetic field up to 90kOe. Below TC, ρH(H) at low fields show peak structures for H ∥ a and H ∥ b, and a shoulder for H ∥ c, the positions of which correspond to those of shoulders that observed in the field dependence of the magnetization. The sharp peak of C(T) due to magnetic transition decays and shifts to the low-temperature side with increasing field for H ∥ a up to 3kOe. The H-T phase diagram below TC is proposed from those measurements. In addition, RH(T) for I ∥ b and H ∥ c at 10kOe increases from a value close to the expected Hall coefficient for a carrier concentration of 1 hole/f.u. with decreasing temperature from 300 K, and shows a peak at 8 K. By the application of a magnetic field, this peak decays and shifts to higher temperatures. RH(T, H) for I ∥ b and H ∥ a is similar to that for I ∥ b and H ∥ c. These peaks of RH(T) are ascribed to the extraordinary Hall effect due to the skew scattering of conduction carriers.

ジャーナルjournal of the physical society of japan
出版ステータスPublished - 2010 8 1

ASJC Scopus subject areas

  • 物理学および天文学(全般)


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