Effect of Pressure on the Electrical Resistivity of Ce1−xErxAl2 Spin Glass

Masashi Ohashi; Masaki Nagare; Yuto Adachi; Keishiro Kobayashi; Hidenori Miyagawa; Gendo Oomi; Kenji Shirasaki

doi:10.7566/JPSJ.89.074708

Effect of Pressure on the Electrical Resistivity of Ce_1−xEr_xAl₂ Spin Glass

Masashi Ohashi, Masaki Nagare, Yuto Adachi, Keishiro Kobayashi, Hidenori Miyagawa, Gendo Oomi, Kenji Shirasaki

International Research Center for Nuclear Materials Science

Research output: Contribution to journal › Article › peer-review

Abstract

The electrical resistivity of the single crystals of the pseudobinary alloy Ce_1−xEr_xAl₂ is measured under high pressure and low temperature. The temperature dependence of the magnetic part of the electrical resistivity, ρ_mag, shows a maximum (T₁) and a shoulder owing to the combination of the Ruderman–Kittel–Kasuya–Yosida interaction of the localized f electron, Kondo effect, and crystalline electric field splitting of the system. As pressure increases for Ce_0.8Er_0.2Al₂, T₁ decreases and seems to be less than 2 K. Moreover, above 1.7 GPa, T₁ appears again and is enhanced rapidly at a high rate of dT₁=dP = 39 K=GPa. This is one of the characteristic behavior around quantum critical point, indicating that a pressure-induced quantum phase transition may exist because of the suppression of the spin-glass interaction.

Original language	English
Article number	074708
Journal	journal of the physical society of japan
Volume	89
Issue number	7
DOIs	https://doi.org/10.7566/JPSJ.89.074708
Publication status	Published - 2020 Jul 15

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Effect of Pressure on the Electrical Resistivity of Ce1−xErxAl2 Spin Glass",

abstract = "The electrical resistivity of the single crystals of the pseudobinary alloy Ce1−xErxAl2 is measured under high pressure and low temperature. The temperature dependence of the magnetic part of the electrical resistivity, ρmag, shows a maximum (T1) and a shoulder owing to the combination of the Ruderman–Kittel–Kasuya–Yosida interaction of the localized f electron, Kondo effect, and crystalline electric field splitting of the system. As pressure increases for Ce0.8Er0.2Al2, T1 decreases and seems to be less than 2 K. Moreover, above 1.7 GPa, T1 appears again and is enhanced rapidly at a high rate of dT1=dP = 39 K=GPa. This is one of the characteristic behavior around quantum critical point, indicating that a pressure-induced quantum phase transition may exist because of the suppression of the spin-glass interaction.",

author = "Masashi Ohashi and Masaki Nagare and Yuto Adachi and Keishiro Kobayashi and Hidenori Miyagawa and Gendo Oomi and Kenji Shirasaki",

note = "Funding Information: Acknowledgment This work was performed by the inter-university cooperative research program of the cooperative research program of the Institute for Materials Research, Tohoku University (Proposal No. 19K0030). This work was supported in part by the Sumitomo Foundation, Izumi Science and Technology Foundation, and Takahashi Industrial and Economic Research Foundation. Funding Information: This work was performed by the inter-university cooperative research program of the cooperative research program of the Institute for Materials Research, Tohoku University (Proposal No. 19K0030). This work was supported in part by the Sumitomo Foundation, Izumi Science and Technology Foundation, and Takahashi Industrial and Economic Research Foundation. Publisher Copyright: {\textcopyright}2020 The Physical Society of Japan.",

year = "2020",

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doi = "10.7566/JPSJ.89.074708",

language = "English",

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T1 - Effect of Pressure on the Electrical Resistivity of Ce1−xErxAl2 Spin Glass

AU - Ohashi, Masashi

AU - Nagare, Masaki

AU - Adachi, Yuto

AU - Kobayashi, Keishiro

AU - Miyagawa, Hidenori

AU - Oomi, Gendo

AU - Shirasaki, Kenji

N1 - Funding Information: Acknowledgment This work was performed by the inter-university cooperative research program of the cooperative research program of the Institute for Materials Research, Tohoku University (Proposal No. 19K0030). This work was supported in part by the Sumitomo Foundation, Izumi Science and Technology Foundation, and Takahashi Industrial and Economic Research Foundation. Funding Information: This work was performed by the inter-university cooperative research program of the cooperative research program of the Institute for Materials Research, Tohoku University (Proposal No. 19K0030). This work was supported in part by the Sumitomo Foundation, Izumi Science and Technology Foundation, and Takahashi Industrial and Economic Research Foundation. Publisher Copyright: ©2020 The Physical Society of Japan.

PY - 2020/7/15

Y1 - 2020/7/15

N2 - The electrical resistivity of the single crystals of the pseudobinary alloy Ce1−xErxAl2 is measured under high pressure and low temperature. The temperature dependence of the magnetic part of the electrical resistivity, ρmag, shows a maximum (T1) and a shoulder owing to the combination of the Ruderman–Kittel–Kasuya–Yosida interaction of the localized f electron, Kondo effect, and crystalline electric field splitting of the system. As pressure increases for Ce0.8Er0.2Al2, T1 decreases and seems to be less than 2 K. Moreover, above 1.7 GPa, T1 appears again and is enhanced rapidly at a high rate of dT1=dP = 39 K=GPa. This is one of the characteristic behavior around quantum critical point, indicating that a pressure-induced quantum phase transition may exist because of the suppression of the spin-glass interaction.

AB - The electrical resistivity of the single crystals of the pseudobinary alloy Ce1−xErxAl2 is measured under high pressure and low temperature. The temperature dependence of the magnetic part of the electrical resistivity, ρmag, shows a maximum (T1) and a shoulder owing to the combination of the Ruderman–Kittel–Kasuya–Yosida interaction of the localized f electron, Kondo effect, and crystalline electric field splitting of the system. As pressure increases for Ce0.8Er0.2Al2, T1 decreases and seems to be less than 2 K. Moreover, above 1.7 GPa, T1 appears again and is enhanced rapidly at a high rate of dT1=dP = 39 K=GPa. This is one of the characteristic behavior around quantum critical point, indicating that a pressure-induced quantum phase transition may exist because of the suppression of the spin-glass interaction.

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Effect of Pressure on the Electrical Resistivity of Ce_1−xEr_xAl₂ Spin Glass

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