Magnetic and Thermal Properties of SmRh$_2$Zn$_{20}$ Single Crystal

Yosikazu Isikawa; Toshio Mizushima; Aika Fujita; Tomohiko Kuwai

doi:10.7566/JPSJ.85.024707

paper

Magnetic and Thermal Properties of SmRh $_{2}$ Zn $_{20}$ Single Crystal

arXiv:1512.02353 · doi:10.7566/JPSJ.85.024707

Abstract

The magnetization, magnetic susceptibility, and specific heat of the single crystalline sample SmRh $_{2}$ Zn $_{20}$ were measured. The valence of Sm ions in SmRh $_{2}$ Zn $_{20}$ was found to be trivalent. No evidence of valence fluctuations was detected. SmRh $_{2}$ Zn $_{20}$ is an antiferromagnet with $T_{N} =$ 2.46 K. The observed $C (T, H)$ curves showed that $T_{N}$ splits into two in the external field $H$ along the [001] and [101]directions. On the other hand, $T_{N}$ in $H$ along the [111] direction did not split, decreasing to 2.20 K at $H = 7$ T. At 2 K, the magnetization $M_{111}$ in $H$ along the [111] direction increased linearly with increasing field, while $M_{001}$ and $M_{101}$ deviated upward slightly from the linear dependence. We analyzed the observed magnetic and thermal properties of SmRh $_{2}$ Zn $_{20}$ taking into account the crystalline-electric-field effect, the Zeeman energy, and the exchange interaction. The theoretical calculation well reproduced the experimental $χ (T)$ , $M (H)$ , $C (T, H)$ and $T_{N} (H)$ . The sublattice magnetic moments are expected to be along the $⟨ 111 ⟩$ direction below $T_{N}$ at $H = 0$ T. Variations of the magnetic structures induced by the external magnetic fields in a narrow temperature region around $T_{N}$ are inferred on the basis of theoretical calculations.

arXiv comment14 pages, 8 figures

Magnetic and Thermal Properties of SmRh $_{2}$ Zn $_{20}$ Single Crystal

Abstract

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Magnetic and Thermal Properties of SmRh2​Zn20​ Single Crystal

Abstract

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Cited by in corpus (2)

Magnetic and Thermal Properties of SmRh $_{2}$ Zn $_{20}$ Single Crystal