Thermal conductivity of PrRh4.8B2, a layered boride compound

Yohei Kakefuda; Kunio Yubuta; Toetsu Shishido; Akira Yoshikawa; Shigeru Okada; Hiraku Ogino; Naoyuki Kawamoto; Tetsuya Baba; Takao Mori

doi:10.1063/1.5005869

Thermal conductivity of PrRh_4.8B₂, a layered boride compound

Yohei Kakefuda, Kunio Yubuta, Toetsu Shishido, Akira Yoshikawa, Shigeru Okada, Hiraku Ogino, Naoyuki Kawamoto, Tetsuya Baba, Takao Mori

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

24 Citations (Scopus)

Abstract

Transmission electron microscopy (TEM), specific heat, and thermal conductivity measurements were carried out for PrRh_4.8B₂ single crystals. PrRh_4.8B₂ takes an interesting layered crystal structure, where PrRh₃B₂ blocks are separated by metal Rh honeycomb layers. The existence of the Rh layers enhances the ferrimagnetic transition temperature. From area-selective picosecond thermoreflectance, the cross-plane thermal conductivity of PrRh_4.8B₂ is estimated to be 1.39 Wm^-1 K^-1, much lower than other layered borides like AlB₂. Judging from the fine crystal structures obtained by TEM, phonon conduction is considered to be depressed due to random dispersion of Rh vacancy sites and two-dimensional nature of PrRh_4.8B₂.

Original language	English
Article number	126103
Journal	APL Materials
Volume	5
Issue number	12
DOIs	https://doi.org/10.1063/1.5005869
Publication status	Published - Dec 1 2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

Materials Science(all)
Engineering(all)

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title = "Thermal conductivity of PrRh4.8B2, a layered boride compound",

abstract = "Transmission electron microscopy (TEM), specific heat, and thermal conductivity measurements were carried out for PrRh4.8B2 single crystals. PrRh4.8B2 takes an interesting layered crystal structure, where PrRh3B2 blocks are separated by metal Rh honeycomb layers. The existence of the Rh layers enhances the ferrimagnetic transition temperature. From area-selective picosecond thermoreflectance, the cross-plane thermal conductivity of PrRh4.8B2 is estimated to be 1.39 Wm-1 K-1, much lower than other layered borides like AlB2. Judging from the fine crystal structures obtained by TEM, phonon conduction is considered to be depressed due to random dispersion of Rh vacancy sites and two-dimensional nature of PrRh4.8B2.",

author = "Yohei Kakefuda and Kunio Yubuta and Toetsu Shishido and Akira Yoshikawa and Shigeru Okada and Hiraku Ogino and Naoyuki Kawamoto and Tetsuya Baba and Takao Mori",

note = "Funding Information: The research was funded by the National Institute for Health Research Health Protection Research Unit (NIHR HPRU) in Healthcare Associated Infections and Antimicrobial Resistance at Imperial College London in partnership with Public Health England (PHE). The views expressed are those of the author(s) and not necessarily those of the NHS, the NIHR, the Department of Health or Public Health England. More information on HPRU and current projects can be found on http://www.imperial.ac.uk/medicine/hpru-amr. Publisher Copyright: {\textcopyright} 2017 Author(s).",

year = "2017",

month = dec,

day = "1",

doi = "10.1063/1.5005869",

language = "English",

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TY - JOUR

T1 - Thermal conductivity of PrRh4.8B2, a layered boride compound

AU - Kakefuda, Yohei

AU - Yubuta, Kunio

AU - Shishido, Toetsu

AU - Yoshikawa, Akira

AU - Okada, Shigeru

AU - Ogino, Hiraku

AU - Kawamoto, Naoyuki

AU - Baba, Tetsuya

AU - Mori, Takao

N1 - Funding Information: The research was funded by the National Institute for Health Research Health Protection Research Unit (NIHR HPRU) in Healthcare Associated Infections and Antimicrobial Resistance at Imperial College London in partnership with Public Health England (PHE). The views expressed are those of the author(s) and not necessarily those of the NHS, the NIHR, the Department of Health or Public Health England. More information on HPRU and current projects can be found on http://www.imperial.ac.uk/medicine/hpru-amr. Publisher Copyright: © 2017 Author(s).

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Transmission electron microscopy (TEM), specific heat, and thermal conductivity measurements were carried out for PrRh4.8B2 single crystals. PrRh4.8B2 takes an interesting layered crystal structure, where PrRh3B2 blocks are separated by metal Rh honeycomb layers. The existence of the Rh layers enhances the ferrimagnetic transition temperature. From area-selective picosecond thermoreflectance, the cross-plane thermal conductivity of PrRh4.8B2 is estimated to be 1.39 Wm-1 K-1, much lower than other layered borides like AlB2. Judging from the fine crystal structures obtained by TEM, phonon conduction is considered to be depressed due to random dispersion of Rh vacancy sites and two-dimensional nature of PrRh4.8B2.

AB - Transmission electron microscopy (TEM), specific heat, and thermal conductivity measurements were carried out for PrRh4.8B2 single crystals. PrRh4.8B2 takes an interesting layered crystal structure, where PrRh3B2 blocks are separated by metal Rh honeycomb layers. The existence of the Rh layers enhances the ferrimagnetic transition temperature. From area-selective picosecond thermoreflectance, the cross-plane thermal conductivity of PrRh4.8B2 is estimated to be 1.39 Wm-1 K-1, much lower than other layered borides like AlB2. Judging from the fine crystal structures obtained by TEM, phonon conduction is considered to be depressed due to random dispersion of Rh vacancy sites and two-dimensional nature of PrRh4.8B2.

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Thermal conductivity of PrRh_4.8B₂, a layered boride compound

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