Structural characterization and magnetic properties of chromium jarosite KCr3(OD)6 (SO4)2

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Structural characterization and magnetic properties of chromium jarosite KCr3(OD)6 (SO4)2. / Janas, Sofie; Sorensen, Mathilde B.; Andersen, Anders B. A.; Juelsholt, Mikkel; Boehm, Martin; Pedersen, Kasper S.; Jensen, Kirsten M. O.; Lefmann, Kim; Nielsen, Ulla Gro.

In: Physical Chemistry Chemical Physics, Vol. 22, No. 43, 21.11.2020, p. 25001-25010.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Janas, S, Sorensen, MB, Andersen, ABA, Juelsholt, M, Boehm, M, Pedersen, KS, Jensen, KMO, Lefmann, K & Nielsen, UG 2020, 'Structural characterization and magnetic properties of chromium jarosite KCr3(OD)6 (SO4)2', Physical Chemistry Chemical Physics, vol. 22, no. 43, pp. 25001-25010. https://doi.org/10.1039/d0cp04978f

APA

Janas, S., Sorensen, M. B., Andersen, A. B. A., Juelsholt, M., Boehm, M., Pedersen, K. S., Jensen, K. M. O., Lefmann, K., & Nielsen, U. G. (2020). Structural characterization and magnetic properties of chromium jarosite KCr3(OD)6 (SO4)2. Physical Chemistry Chemical Physics, 22(43), 25001-25010. https://doi.org/10.1039/d0cp04978f

Vancouver

Janas S, Sorensen MB, Andersen ABA, Juelsholt M, Boehm M, Pedersen KS et al. Structural characterization and magnetic properties of chromium jarosite KCr3(OD)6 (SO4)2. Physical Chemistry Chemical Physics. 2020 Nov 21;22(43):25001-25010. https://doi.org/10.1039/d0cp04978f

Author

Janas, Sofie ; Sorensen, Mathilde B. ; Andersen, Anders B. A. ; Juelsholt, Mikkel ; Boehm, Martin ; Pedersen, Kasper S. ; Jensen, Kirsten M. O. ; Lefmann, Kim ; Nielsen, Ulla Gro. / Structural characterization and magnetic properties of chromium jarosite KCr3(OD)6 (SO4)2. In: Physical Chemistry Chemical Physics. 2020 ; Vol. 22, No. 43. pp. 25001-25010.

Bibtex

@article{39bbbd95e31949c89e0a75b2105caa46,
title = "Structural characterization and magnetic properties of chromium jarosite KCr3(OD)6 (SO4)2",
abstract = "Potassium chromium jarosite, KCr3(OH)(6)(SO4)(2) (Cr-jarosite), is considered a promising candidate to display spin liquid behavior due to the strong magnetic frustration imposed by the crystal structure. However, the ground state magnetic properties have been debated, since Cr-jarosite is notoriously non-stoichiometric. Our study reports the magnetic properties for deuterated KCr3(OD)(6)(SO4)(2) on chemically well-defined samples, which have been characteried by a combination of powder X-ray diffraction, neutron diffraction, solid state NMR spectroscopy, and scanning electron microscopy with energy dispersive spectroscopy. Eight polycrystalline samples, which all contained only 1-3% Cr vacancies were obtained. However, significant substitution (2-27%) of potassium with H2O and/or H3O+ was observed and resulted in pronounced stacking disorder along the c-axis. A clear second-order transition to an antiferromagnetically ordered phase at T-N = 3.8(1) K with a small net moment of 0.03 mu(B) per Cr3+-ion was obtained from vibrating sample magnetometry and temperature dependent neutron diffraction. The moment is attributed to spin canting caused by the Dzyaloshinskii-Moriya interaction. Thus, our experimental results imply that even ideal potassium chromium jarosite will exhibit magnetic order below 4 K and therefore it does not qualify as a true spin liquid material.",
keywords = "KAGOME, PURE, SPIN, NA, ANTIFERROMAGNETS, ENVIRONMENTS, DISORDER, SERIES, ORDER, FE",
author = "Sofie Janas and Sorensen, {Mathilde B.} and Andersen, {Anders B. A.} and Mikkel Juelsholt and Martin Boehm and Pedersen, {Kasper S.} and Jensen, {Kirsten M. O.} and Kim Lefmann and Nielsen, {Ulla Gro}",
year = "2020",
month = nov,
day = "21",
doi = "10.1039/d0cp04978f",
language = "English",
volume = "22",
pages = "25001--25010",
journal = "Physical Chemistry Chemical Physics",
issn = "1463-9076",
publisher = "Royal Society of Chemistry",
number = "43",

}

RIS

TY - JOUR

T1 - Structural characterization and magnetic properties of chromium jarosite KCr3(OD)6 (SO4)2

AU - Janas, Sofie

AU - Sorensen, Mathilde B.

AU - Andersen, Anders B. A.

AU - Juelsholt, Mikkel

AU - Boehm, Martin

AU - Pedersen, Kasper S.

AU - Jensen, Kirsten M. O.

AU - Lefmann, Kim

AU - Nielsen, Ulla Gro

PY - 2020/11/21

Y1 - 2020/11/21

N2 - Potassium chromium jarosite, KCr3(OH)(6)(SO4)(2) (Cr-jarosite), is considered a promising candidate to display spin liquid behavior due to the strong magnetic frustration imposed by the crystal structure. However, the ground state magnetic properties have been debated, since Cr-jarosite is notoriously non-stoichiometric. Our study reports the magnetic properties for deuterated KCr3(OD)(6)(SO4)(2) on chemically well-defined samples, which have been characteried by a combination of powder X-ray diffraction, neutron diffraction, solid state NMR spectroscopy, and scanning electron microscopy with energy dispersive spectroscopy. Eight polycrystalline samples, which all contained only 1-3% Cr vacancies were obtained. However, significant substitution (2-27%) of potassium with H2O and/or H3O+ was observed and resulted in pronounced stacking disorder along the c-axis. A clear second-order transition to an antiferromagnetically ordered phase at T-N = 3.8(1) K with a small net moment of 0.03 mu(B) per Cr3+-ion was obtained from vibrating sample magnetometry and temperature dependent neutron diffraction. The moment is attributed to spin canting caused by the Dzyaloshinskii-Moriya interaction. Thus, our experimental results imply that even ideal potassium chromium jarosite will exhibit magnetic order below 4 K and therefore it does not qualify as a true spin liquid material.

AB - Potassium chromium jarosite, KCr3(OH)(6)(SO4)(2) (Cr-jarosite), is considered a promising candidate to display spin liquid behavior due to the strong magnetic frustration imposed by the crystal structure. However, the ground state magnetic properties have been debated, since Cr-jarosite is notoriously non-stoichiometric. Our study reports the magnetic properties for deuterated KCr3(OD)(6)(SO4)(2) on chemically well-defined samples, which have been characteried by a combination of powder X-ray diffraction, neutron diffraction, solid state NMR spectroscopy, and scanning electron microscopy with energy dispersive spectroscopy. Eight polycrystalline samples, which all contained only 1-3% Cr vacancies were obtained. However, significant substitution (2-27%) of potassium with H2O and/or H3O+ was observed and resulted in pronounced stacking disorder along the c-axis. A clear second-order transition to an antiferromagnetically ordered phase at T-N = 3.8(1) K with a small net moment of 0.03 mu(B) per Cr3+-ion was obtained from vibrating sample magnetometry and temperature dependent neutron diffraction. The moment is attributed to spin canting caused by the Dzyaloshinskii-Moriya interaction. Thus, our experimental results imply that even ideal potassium chromium jarosite will exhibit magnetic order below 4 K and therefore it does not qualify as a true spin liquid material.

KW - KAGOME

KW - PURE

KW - SPIN

KW - NA

KW - ANTIFERROMAGNETS

KW - ENVIRONMENTS

KW - DISORDER

KW - SERIES

KW - ORDER

KW - FE

U2 - 10.1039/d0cp04978f

DO - 10.1039/d0cp04978f

M3 - Journal article

C2 - 33112325

VL - 22

SP - 25001

EP - 25010

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

SN - 1463-9076

IS - 43

ER -

ID: 252105832