Weak ferrimagnetism and multiple magnetization reversal in α-Cr 3 (PO 4 ) 2

A. N. Vasiliev; O. S. Volkova; E. Hammer; R. Glaum; J. M. Broto; M. Millot; G. Nénert; Y. T. Liu; Jiunn-Yuan Lin; R. Klingeler; M. Abdel-Hafiez; Y. Krupskaya; A. U.B. Wolter; B. Büchner

doi:10.1103/PhysRevB.85.014415

Weak ferrimagnetism and multiple magnetization reversal in α-Cr ₃ (PO ₄ ) ₂

A. N. Vasiliev^*, O. S. Volkova, E. Hammer, R. Glaum, J. M. Broto, M. Millot, G. Nénert, Y. T. Liu, Jiunn-Yuan Lin, R. Klingeler, M. Abdel-Hafiez, Y. Krupskaya, A. U.B. Wolter, B. Büchner

^*Corresponding author for this work

Institute of Physics

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

7 Scopus citations

Abstract

The chromium(II) orthophosphate α-Cr ₃ (PO ₄ ) ₂ is a weak ferrimagnet with the Curie temperature T _C = 29 K confirmed by a λ-type peak in specific heat. Dominant antiferromagnetic interactions in this system are characterized by the Weiss temperature Θ = 96 K, indicating an intermediate frustration ratio Θ/T _C ∼ 3. In its magnetically ordered states α-Cr ₃ (PO ₄ ) ₂ exhibits a remarkable sequence of temperature-induced magnetization reversals sensitive to the protocol of measurements, i.e., either field-cooled or zero-field-cooled regimes. The reduction of the effective magnetic moment 4.5 μ _B / Cr2 ⁺ , as compared to the spin-only moment 4.9 μ _B / Cr2 ⁺ , cannot be ascribed to the occurrence of the low-spin state in any crystallographic site of the Jahn-Teller active 3d4 Cr2 ⁺ ions. X-ray absorption spectra at the K edge indicate divalent chromium and unravel the high-spin state of these ions at the L _2,3 edges. Weak ferrimagnetism and multiple magnetization reversal phenomena seen in this compound could be ascribed to incomplete cancellation and distortion of partial spontaneous magnetization functions of Cr2 ⁺ in its six crystallographically inequivalent positions.

Original language	English
Article number	014415
Pages (from-to)	1-7
Number of pages	7
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	85
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.85.014415
State	Published - 18 Jan 2012

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Vasiliev, A. N., Volkova, O. S., Hammer, E., Glaum, R., Broto, J. M., Millot, M., Nénert, G., Liu, Y. T., Lin, J-Y., Klingeler, R., Abdel-Hafiez, M., Krupskaya, Y., Wolter, A. U. B., & Büchner, B. (2012). Weak ferrimagnetism and multiple magnetization reversal in α-Cr ₃ (PO ₄ ) ₂. Physical Review B - Condensed Matter and Materials Physics, 85(1), 1-7. [014415]. https://doi.org/10.1103/PhysRevB.85.014415

@article{689082ce669146a6978608130cfd798f,

title = "Weak ferrimagnetism and multiple magnetization reversal in α-Cr 3 (PO 4 ) 2",

abstract = " The chromium(II) orthophosphate α-Cr 3 (PO 4 ) 2 is a weak ferrimagnet with the Curie temperature T C = 29 K confirmed by a λ-type peak in specific heat. Dominant antiferromagnetic interactions in this system are characterized by the Weiss temperature Θ = 96 K, indicating an intermediate frustration ratio Θ/T C ∼ 3. In its magnetically ordered states α-Cr 3 (PO 4 ) 2 exhibits a remarkable sequence of temperature-induced magnetization reversals sensitive to the protocol of measurements, i.e., either field-cooled or zero-field-cooled regimes. The reduction of the effective magnetic moment 4.5 μ B / Cr2 + , as compared to the spin-only moment 4.9 μ B / Cr2 + , cannot be ascribed to the occurrence of the low-spin state in any crystallographic site of the Jahn-Teller active 3d4 Cr2 + ions. X-ray absorption spectra at the K edge indicate divalent chromium and unravel the high-spin state of these ions at the L 2,3 edges. Weak ferrimagnetism and multiple magnetization reversal phenomena seen in this compound could be ascribed to incomplete cancellation and distortion of partial spontaneous magnetization functions of Cr2 + in its six crystallographically inequivalent positions.",

author = "Vasiliev, {A. N.} and Volkova, {O. S.} and E. Hammer and R. Glaum and Broto, {J. M.} and M. Millot and G. N{\'e}nert and Liu, {Y. T.} and Jiunn-Yuan Lin and R. Klingeler and M. Abdel-Hafiez and Y. Krupskaya and Wolter, {A. U.B.} and B. B{\"u}chner",

year = "2012",

month = jan,

day = "18",

doi = "10.1103/PhysRevB.85.014415",

language = "English",

volume = "85",

pages = "1--7",

journal = "Physical Review B",

issn = "2469-9950",

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Vasiliev, AN, Volkova, OS, Hammer, E, Glaum, R, Broto, JM, Millot, M, Nénert, G, Liu, YT, Lin, J-Y, Klingeler, R, Abdel-Hafiez, M, Krupskaya, Y, Wolter, AUB & Büchner, B 2012, 'Weak ferrimagnetism and multiple magnetization reversal in α-Cr ₃ (PO ₄ ) ₂', Physical Review B - Condensed Matter and Materials Physics, vol. 85, no. 1, 014415, pp. 1-7. https://doi.org/10.1103/PhysRevB.85.014415

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T1 - Weak ferrimagnetism and multiple magnetization reversal in α-Cr 3 (PO 4 ) 2

AU - Vasiliev, A. N.

AU - Volkova, O. S.

AU - Hammer, E.

AU - Glaum, R.

AU - Broto, J. M.

AU - Millot, M.

AU - Nénert, G.

AU - Liu, Y. T.

AU - Lin, Jiunn-Yuan

AU - Klingeler, R.

AU - Abdel-Hafiez, M.

AU - Krupskaya, Y.

AU - Wolter, A. U.B.

AU - Büchner, B.

PY - 2012/1/18

Y1 - 2012/1/18

N2 - The chromium(II) orthophosphate α-Cr 3 (PO 4 ) 2 is a weak ferrimagnet with the Curie temperature T C = 29 K confirmed by a λ-type peak in specific heat. Dominant antiferromagnetic interactions in this system are characterized by the Weiss temperature Θ = 96 K, indicating an intermediate frustration ratio Θ/T C ∼ 3. In its magnetically ordered states α-Cr 3 (PO 4 ) 2 exhibits a remarkable sequence of temperature-induced magnetization reversals sensitive to the protocol of measurements, i.e., either field-cooled or zero-field-cooled regimes. The reduction of the effective magnetic moment 4.5 μ B / Cr2 + , as compared to the spin-only moment 4.9 μ B / Cr2 + , cannot be ascribed to the occurrence of the low-spin state in any crystallographic site of the Jahn-Teller active 3d4 Cr2 + ions. X-ray absorption spectra at the K edge indicate divalent chromium and unravel the high-spin state of these ions at the L 2,3 edges. Weak ferrimagnetism and multiple magnetization reversal phenomena seen in this compound could be ascribed to incomplete cancellation and distortion of partial spontaneous magnetization functions of Cr2 + in its six crystallographically inequivalent positions.

AB - The chromium(II) orthophosphate α-Cr 3 (PO 4 ) 2 is a weak ferrimagnet with the Curie temperature T C = 29 K confirmed by a λ-type peak in specific heat. Dominant antiferromagnetic interactions in this system are characterized by the Weiss temperature Θ = 96 K, indicating an intermediate frustration ratio Θ/T C ∼ 3. In its magnetically ordered states α-Cr 3 (PO 4 ) 2 exhibits a remarkable sequence of temperature-induced magnetization reversals sensitive to the protocol of measurements, i.e., either field-cooled or zero-field-cooled regimes. The reduction of the effective magnetic moment 4.5 μ B / Cr2 + , as compared to the spin-only moment 4.9 μ B / Cr2 + , cannot be ascribed to the occurrence of the low-spin state in any crystallographic site of the Jahn-Teller active 3d4 Cr2 + ions. X-ray absorption spectra at the K edge indicate divalent chromium and unravel the high-spin state of these ions at the L 2,3 edges. Weak ferrimagnetism and multiple magnetization reversal phenomena seen in this compound could be ascribed to incomplete cancellation and distortion of partial spontaneous magnetization functions of Cr2 + in its six crystallographically inequivalent positions.

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U2 - 10.1103/PhysRevB.85.014415

DO - 10.1103/PhysRevB.85.014415

M3 - Article

AN - SCOPUS:84863025191

SN - 2469-9950

VL - 85

SP - 1

EP - 7

JO - Physical Review B

JF - Physical Review B

IS - 1

M1 - 014415

ER -

Weak ferrimagnetism and multiple magnetization reversal in α-Cr ₃ (PO ₄ ) ₂

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