Temperature and composition phase diagram in the iron-based ladder compounds Ba1-xCsxFe2Se3

Takafumi Hawai; Yusuke Nambu; Kenya Ohgushi; Fei Du; Yasuyuki Hirata; Maxim Avdeev; Yoshiya Uwatoko; Yurina Sekine; Hiroshi Fukazawa; Jie Ma; Songxue Chi; Yutaka Ueda; Hideki Yoshizawa; Taku J. Sato

doi:10.1103/PhysRevB.91.184416

Temperature and composition phase diagram in the iron-based ladder compounds Ba1-xCsxFe2Se3

Takafumi Hawai, Yusuke Nambu, Kenya Ohgushi, Fei Du, Yasuyuki Hirata, Maxim Avdeev, Yoshiya Uwatoko, Yurina Sekine, Hiroshi Fukazawa, Jie Ma, Songxue Chi, Yutaka Ueda, Hideki Yoshizawa, Taku J. Sato

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Abstract

We investigated the iron-based ladder compounds (Ba,Cs)Fe2Se3. Their parent compounds BaFe2Se3 and CsFe2Se3 have different space groups, formal valences of Fe, and magnetic structures. Electrical resistivity, specific heat, magnetic susceptibility, x-ray diffraction, and powder neutron diffraction measurements were conducted to obtain a temperature and composition phase diagram of this system. Block magnetism observed in BaFe2Se3 is drastically suppressed with Cs doping. In contrast, stripe magnetism observed in CsFe2Se3 is not so fragile against Ba doping. A new type of magnetic structure appears in intermediate compositions, which is similar to stripe magnetism of CsFe2Se3, but interladder spin configuration is different. Intermediate compounds show insulating behavior, nevertheless a finite T-linear contribution in specific heat was obtained at low temperatures.

Original language	English
Article number	184416
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	91
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.91.184416
State	Published - May 28 2015

Funding

Funders	Funder number
Japan Society for the Promotion of Science	23244068, 25790087, 26800175
Japan Society for the Promotion of Science

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10.1103/PhysRevB.91.184416

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Hawai, T., Nambu, Y., Ohgushi, K., Du, F., Hirata, Y., Avdeev, M., Uwatoko, Y., Sekine, Y., Fukazawa, H., Ma, J., Chi, S., Ueda, Y., Yoshizawa, H., & Sato, T. J. (2015). Temperature and composition phase diagram in the iron-based ladder compounds Ba1-xCsxFe2Se3. Physical Review B - Condensed Matter and Materials Physics, 91(18), Article 184416. https://doi.org/10.1103/PhysRevB.91.184416

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title = "Temperature and composition phase diagram in the iron-based ladder compounds Ba1-xCsxFe2Se3",

abstract = "We investigated the iron-based ladder compounds (Ba,Cs)Fe2Se3. Their parent compounds BaFe2Se3 and CsFe2Se3 have different space groups, formal valences of Fe, and magnetic structures. Electrical resistivity, specific heat, magnetic susceptibility, x-ray diffraction, and powder neutron diffraction measurements were conducted to obtain a temperature and composition phase diagram of this system. Block magnetism observed in BaFe2Se3 is drastically suppressed with Cs doping. In contrast, stripe magnetism observed in CsFe2Se3 is not so fragile against Ba doping. A new type of magnetic structure appears in intermediate compositions, which is similar to stripe magnetism of CsFe2Se3, but interladder spin configuration is different. Intermediate compounds show insulating behavior, nevertheless a finite T-linear contribution in specific heat was obtained at low temperatures.",

author = "Takafumi Hawai and Yusuke Nambu and Kenya Ohgushi and Fei Du and Yasuyuki Hirata and Maxim Avdeev and Yoshiya Uwatoko and Yurina Sekine and Hiroshi Fukazawa and Jie Ma and Songxue Chi and Yutaka Ueda and Hideki Yoshizawa and Sato, {Taku J.}",

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doi = "10.1103/PhysRevB.91.184416",

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Hawai, T, Nambu, Y, Ohgushi, K, Du, F, Hirata, Y, Avdeev, M, Uwatoko, Y, Sekine, Y, Fukazawa, H, Ma, J, Chi, S, Ueda, Y, Yoshizawa, H & Sato, TJ 2015, 'Temperature and composition phase diagram in the iron-based ladder compounds Ba1-xCsxFe2Se3', Physical Review B - Condensed Matter and Materials Physics, vol. 91, no. 18, 184416. https://doi.org/10.1103/PhysRevB.91.184416

TY - JOUR

T1 - Temperature and composition phase diagram in the iron-based ladder compounds Ba1-xCsxFe2Se3

AU - Hawai, Takafumi

AU - Nambu, Yusuke

AU - Ohgushi, Kenya

AU - Du, Fei

AU - Hirata, Yasuyuki

AU - Avdeev, Maxim

AU - Uwatoko, Yoshiya

AU - Sekine, Yurina

AU - Fukazawa, Hiroshi

AU - Ma, Jie

AU - Chi, Songxue

AU - Ueda, Yutaka

AU - Yoshizawa, Hideki

AU - Sato, Taku J.

PY - 2015/5/28

Y1 - 2015/5/28

N2 - We investigated the iron-based ladder compounds (Ba,Cs)Fe2Se3. Their parent compounds BaFe2Se3 and CsFe2Se3 have different space groups, formal valences of Fe, and magnetic structures. Electrical resistivity, specific heat, magnetic susceptibility, x-ray diffraction, and powder neutron diffraction measurements were conducted to obtain a temperature and composition phase diagram of this system. Block magnetism observed in BaFe2Se3 is drastically suppressed with Cs doping. In contrast, stripe magnetism observed in CsFe2Se3 is not so fragile against Ba doping. A new type of magnetic structure appears in intermediate compositions, which is similar to stripe magnetism of CsFe2Se3, but interladder spin configuration is different. Intermediate compounds show insulating behavior, nevertheless a finite T-linear contribution in specific heat was obtained at low temperatures.

AB - We investigated the iron-based ladder compounds (Ba,Cs)Fe2Se3. Their parent compounds BaFe2Se3 and CsFe2Se3 have different space groups, formal valences of Fe, and magnetic structures. Electrical resistivity, specific heat, magnetic susceptibility, x-ray diffraction, and powder neutron diffraction measurements were conducted to obtain a temperature and composition phase diagram of this system. Block magnetism observed in BaFe2Se3 is drastically suppressed with Cs doping. In contrast, stripe magnetism observed in CsFe2Se3 is not so fragile against Ba doping. A new type of magnetic structure appears in intermediate compositions, which is similar to stripe magnetism of CsFe2Se3, but interladder spin configuration is different. Intermediate compounds show insulating behavior, nevertheless a finite T-linear contribution in specific heat was obtained at low temperatures.

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Temperature and composition phase diagram in the iron-based ladder compounds Ba1-xCsxFe2Se3

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