Crucial Role of Site Disorder and Frustration in Unusual Magnetic Properties of Quasi-2D Triangular Lattice Antimonate Na4FeSbO6

Elena A. Zvereva; Igor A. Presniakov; Myung Hwan Whangbo; Hyun Joo Koo; Tatyana V. Frantsuzenko; Olga A. Savelieva; Alexey V. Sobolev; Vladimir B. Nalbandyan; Pei Shan Shih; Jen Che Chiang; Jenn Min Lee; Jin Ming Chen; Jiunn Yuan Lin; Bernd Büchner; Alexander N. Vasiliev

doi:10.1007/s00723-015-0700-5

Crucial Role of Site Disorder and Frustration in Unusual Magnetic Properties of Quasi-2D Triangular Lattice Antimonate Na₄FeSbO₆

Elena A. Zvereva, Igor A. Presniakov, Myung Hwan Whangbo, Hyun Joo Koo, Tatyana V. Frantsuzenko, Olga A. Savelieva, Alexey V. Sobolev, Vladimir B. Nalbandyan, Pei Shan Shih, Jen Che Chiang, Jenn Min Lee, Jin Ming Chen, Jiunn Yuan Lin, Bernd Büchner, Alexander N. Vasiliev

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Abstract

The effect of antisite disorder in the layered sodium iron antimonate Na₄FeSbO₆ was examined both experimentally and theoretically. The magnetic susceptibility and specific heat measurements show that Na₄FeSbO₆ does not undergo a long-range antiferromagnetic order, unlike its structural analog Li₄FeSbO₆. The electron spin resonance yields the complicated picture of coexistence of two magnetic subsystems corresponding to two different Fe cation positions in the lattice (regular and antisite) and driving the magnetic properties of the Na₄FeSbO₆. This conclusion found perfect confirmation from both the Mössbauer and X-ray absorption data which show the presence of two kinds of Fe³⁺ ions being in high-spin Fe³⁺ (S = 5/2) and low-spin Fe³⁺ (S = 1/2) states. These findings arise from the antisite disorder between the Fe³⁺ and Sb⁵⁺ ions in the (NaFeSbO₆)³⁻ layers of Na₄FeSbO₆. Our density functional calculations show that the Fe³⁺ ions located at the Sb⁵⁺ sites exist as low-spin Fe³⁺ ions, and that the spins of each Fe³⁺ (S = 5/2)–Fe³⁺ (S = 1/2)–Fe³⁺ (S = 5/2) trimer generated by the antisite disorder has a ferrimagnetic arrangement Fe³⁺↑–Fe³⁺↓–Fe³⁺↑, which enhances the magnetization of Na₄FeSbO₆ and leads to an apparently positive Curie–Weiss temperature.

Original language	English
Pages (from-to)	1121-1145
Number of pages	25
Journal	Applied Magnetic Resonance
Volume	46
Issue number	10
DOIs	https://doi.org/10.1007/s00723-015-0700-5
Publication status	Published - 22 Oct 2015

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Publisher Copyright:
© 2015, Springer-Verlag Wien.

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10.1007/s00723-015-0700-5

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Zvereva, E. A., Presniakov, I. A., Whangbo, M. H., Koo, H. J., Frantsuzenko, T. V., Savelieva, O. A., Sobolev, A. V., Nalbandyan, V. B., Shih, P. S., Chiang, J. C., Lee, J. M., Chen, J. M., Lin, J. Y., Büchner, B., & Vasiliev, A. N. (2015). Crucial Role of Site Disorder and Frustration in Unusual Magnetic Properties of Quasi-2D Triangular Lattice Antimonate Na₄FeSbO₆ Applied Magnetic Resonance, 46(10), 1121-1145. https://doi.org/10.1007/s00723-015-0700-5

@article{96124a0c8dfb4ef69813b874e4ceec21,

title = "Crucial Role of Site Disorder and Frustration in Unusual Magnetic Properties of Quasi-2D Triangular Lattice Antimonate Na4FeSbO6 ",

abstract = "The effect of antisite disorder in the layered sodium iron antimonate Na4FeSbO6 was examined both experimentally and theoretically. The magnetic susceptibility and specific heat measurements show that Na4FeSbO6 does not undergo a long-range antiferromagnetic order, unlike its structural analog Li4FeSbO6. The electron spin resonance yields the complicated picture of coexistence of two magnetic subsystems corresponding to two different Fe cation positions in the lattice (regular and antisite) and driving the magnetic properties of the Na4FeSbO6. This conclusion found perfect confirmation from both the M{\"o}ssbauer and X-ray absorption data which show the presence of two kinds of Fe3+ ions being in high-spin Fe3+ (S = 5/2) and low-spin Fe3+ (S = 1/2) states. These findings arise from the antisite disorder between the Fe3+ and Sb5+ ions in the (NaFeSbO6)3− layers of Na4FeSbO6. Our density functional calculations show that the Fe3+ ions located at the Sb5+ sites exist as low-spin Fe3+ ions, and that the spins of each Fe3+ (S = 5/2)–Fe3+ (S = 1/2)–Fe3+ (S = 5/2) trimer generated by the antisite disorder has a ferrimagnetic arrangement Fe3+↑–Fe3+↓–Fe3+↑, which enhances the magnetization of Na4FeSbO6 and leads to an apparently positive Curie–Weiss temperature.",

author = "Zvereva, {Elena A.} and Presniakov, {Igor A.} and Whangbo, {Myung Hwan} and Koo, {Hyun Joo} and Frantsuzenko, {Tatyana V.} and Savelieva, {Olga A.} and Sobolev, {Alexey V.} and Nalbandyan, {Vladimir B.} and Shih, {Pei Shan} and Chiang, {Jen Che} and Lee, {Jenn Min} and Chen, {Jin Ming} and Lin, {Jiunn Yuan} and Bernd B{\"u}chner and Vasiliev, {Alexander N.}",

note = "Publisher Copyright: {\textcopyright} 2015, Springer-Verlag Wien.",

year = "2015",

month = oct,

day = "22",

doi = "10.1007/s00723-015-0700-5",

language = "English",

volume = "46",

pages = "1121--1145",

journal = "Applied Magnetic Resonance",

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Zvereva, EA, Presniakov, IA, Whangbo, MH, Koo, HJ, Frantsuzenko, TV, Savelieva, OA, Sobolev, AV, Nalbandyan, VB, Shih, PS, Chiang, JC, Lee, JM, Chen, JM, Lin, JY, Büchner, B & Vasiliev, AN 2015, 'Crucial Role of Site Disorder and Frustration in Unusual Magnetic Properties of Quasi-2D Triangular Lattice Antimonate Na₄FeSbO₆ ', Applied Magnetic Resonance, vol. 46, no. 10, pp. 1121-1145. https://doi.org/10.1007/s00723-015-0700-5

TY - JOUR

T1 - Crucial Role of Site Disorder and Frustration in Unusual Magnetic Properties of Quasi-2D Triangular Lattice Antimonate Na4FeSbO6

AU - Zvereva, Elena A.

AU - Presniakov, Igor A.

AU - Whangbo, Myung Hwan

AU - Koo, Hyun Joo

AU - Frantsuzenko, Tatyana V.

AU - Savelieva, Olga A.

AU - Sobolev, Alexey V.

AU - Nalbandyan, Vladimir B.

AU - Shih, Pei Shan

AU - Chiang, Jen Che

AU - Lee, Jenn Min

AU - Chen, Jin Ming

AU - Lin, Jiunn Yuan

AU - Büchner, Bernd

AU - Vasiliev, Alexander N.

PY - 2015/10/22

Y1 - 2015/10/22

N2 - The effect of antisite disorder in the layered sodium iron antimonate Na4FeSbO6 was examined both experimentally and theoretically. The magnetic susceptibility and specific heat measurements show that Na4FeSbO6 does not undergo a long-range antiferromagnetic order, unlike its structural analog Li4FeSbO6. The electron spin resonance yields the complicated picture of coexistence of two magnetic subsystems corresponding to two different Fe cation positions in the lattice (regular and antisite) and driving the magnetic properties of the Na4FeSbO6. This conclusion found perfect confirmation from both the Mössbauer and X-ray absorption data which show the presence of two kinds of Fe3+ ions being in high-spin Fe3+ (S = 5/2) and low-spin Fe3+ (S = 1/2) states. These findings arise from the antisite disorder between the Fe3+ and Sb5+ ions in the (NaFeSbO6)3− layers of Na4FeSbO6. Our density functional calculations show that the Fe3+ ions located at the Sb5+ sites exist as low-spin Fe3+ ions, and that the spins of each Fe3+ (S = 5/2)–Fe3+ (S = 1/2)–Fe3+ (S = 5/2) trimer generated by the antisite disorder has a ferrimagnetic arrangement Fe3+↑–Fe3+↓–Fe3+↑, which enhances the magnetization of Na4FeSbO6 and leads to an apparently positive Curie–Weiss temperature.

AB - The effect of antisite disorder in the layered sodium iron antimonate Na4FeSbO6 was examined both experimentally and theoretically. The magnetic susceptibility and specific heat measurements show that Na4FeSbO6 does not undergo a long-range antiferromagnetic order, unlike its structural analog Li4FeSbO6. The electron spin resonance yields the complicated picture of coexistence of two magnetic subsystems corresponding to two different Fe cation positions in the lattice (regular and antisite) and driving the magnetic properties of the Na4FeSbO6. This conclusion found perfect confirmation from both the Mössbauer and X-ray absorption data which show the presence of two kinds of Fe3+ ions being in high-spin Fe3+ (S = 5/2) and low-spin Fe3+ (S = 1/2) states. These findings arise from the antisite disorder between the Fe3+ and Sb5+ ions in the (NaFeSbO6)3− layers of Na4FeSbO6. Our density functional calculations show that the Fe3+ ions located at the Sb5+ sites exist as low-spin Fe3+ ions, and that the spins of each Fe3+ (S = 5/2)–Fe3+ (S = 1/2)–Fe3+ (S = 5/2) trimer generated by the antisite disorder has a ferrimagnetic arrangement Fe3+↑–Fe3+↓–Fe3+↑, which enhances the magnetization of Na4FeSbO6 and leads to an apparently positive Curie–Weiss temperature.

UR - http://www.scopus.com/inward/record.url?scp=84941881098&partnerID=8YFLogxK

U2 - 10.1007/s00723-015-0700-5

DO - 10.1007/s00723-015-0700-5

M3 - Article

AN - SCOPUS:84941881098

SN - 0937-9347

VL - 46

SP - 1121

EP - 1145

JO - Applied Magnetic Resonance

JF - Applied Magnetic Resonance

IS - 10

ER -

Crucial Role of Site Disorder and Frustration in Unusual Magnetic Properties of Quasi-2D Triangular Lattice Antimonate Na₄FeSbO₆

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