Pressure-induced Transition of the Sublattice Magnetization in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>EuCo</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mrow><msub><mrow><mi>P</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math>: Change from Local Moment <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Eu</mi><mo>(</mo><mn>4</mn><mi mathvariant="italic">f</mi><mo>)</mo></math> to Itinerant <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Co</mi><mo>(</mo><mn>3</mn><mi mathvariant="italic">d</mi><mo>)</mo></math> Magnetism

M. Chefki; M. M. Abd-Elmeguid; H. Micklitz; C. Huhnt; W. Schlabitz; M. Reehuis; W. Jeitschko

doi:10.1103/PhysRevLett.80.802

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Pressure-induced Transition of the Sublattice Magnetization in ${EuCo}_{2} P_{2}$ : Change from Local Moment $Eu (4 f)$ to Itinerant $Co (3 d)$ Magnetism

M. Chefki, M. M. Abd-Elmeguid, H. Micklitz, C. Huhnt, and W. Schlabitz

M. Reehuis^* and W. Jeitschko

II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany

Anorg.-Chemisches Institut, Westf. Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 8, D-48149 Münster, Germany

^*Present address: Hahn-Meitner Institut, Glienicker Strasse 100, D-14109 Berlin, Germany.

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Phys. Rev. Lett. 80, 802 – Published 26 January, 1998

DOI: https://doi.org/10.1103/PhysRevLett.80.802

Abstract

Antiferromagnetism in ${EuCo}_{2} P_{2}$ ( ${ThCr}_{2} {Si}_{2}$ -type structure) is due to ordering of the ${Eu}^{2 +} ({}^{8}S_{7 / 2})$ sublattice moments $(T_{N} = 66.5 K)$ while the $Co (3 d)$ sublattice does not carry any magnetic moment. ${EuCo}_{2} P_{2}$ undergoes a pressure-induced isostructural phase transition at $p_{c} = 3.1 GPa$ . $^{151}$ Eu high-pressure Mössbauer experiments $(0 \leq p \leq 5 GPa)$ reveal a valence transition of Eu from ${Eu}^{2 +}$ to nonmagnetic ${Eu}^{3 +} ({}^{7}F_{0})$ at $p > p_{c}$ with the consequence that the disappearance of the $Eu (4 f)$ sublattice magnetism is accompanied by a simultaneous appearance of $Co (3 d)$ sublattice magnetism $(T_{N}^{*} = 260 K)$ . The latter is explained by the filling of the $3 d$ states.

References (18)

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R. Nagarajan, E. V. Sampathkumaran, L. C. Gupta, and R. Vijayaraghavan, Phys. Lett. 84A, 275 (1981).
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A. Wurth, D. Johrendt, A. Mewis, C. Huhnt, G. Michels, M. Roepke, and W. Schlabitz, Z. Anorg. Allg. Chem. 623, 1418 (1997).
C. Huhnt, W. Schlabitz, A. Wurth, A. Mewis, and M. Reehuis, Phys. Rev. B (to be published).
M. Reehuis, G. Kotzyba, B. Zimmer, W. Jeitschko, and X. Hu, J. Alloys. Compd. (to be published).
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G. Gilat and I. Nowik, Phys. Rev. 130, 1361 (1963).
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M. Reehuis, P. J. Brown, W. Jeitschko, M. H. Möller, and T. Vomhof, J. Phys. Chem. Solids 54, 469 (1993).

[c1] M. Reehuis and W. Jeitschko, J. Phys. Chem. Solids 51, 961 (1990), and references therein.

[c2] E. Mörsen, B. D. Mosel, W. Müller-Warmuth, M. Reehuis, and W. Jeitschko, J. Phys. Chem. Solids 49, 785 (1988).

[c3] R. Nagarajan, E. V. Sampathkumaran, L. C. Gupta, and R. Vijayaraghavan, Phys. Lett. 84A, 275 (1981).

[c4] M. Reehuis, W. Jeitschko, M. H. Möller, and P. J. Brown, J. Phys. Chem. Solids 53, 687 (1992).

[c5] I. Nowik, Y. Levi, I. Felner, and E. R. Bauminger, J. Magn. Magn. Mater. 147, 373 (1995); I. Nowik, I. Felner, and E. R. Bauminger, Phys. Rev. B 55, 3033 (1997).

[c6] R. Nagarajan, C. Mazumdar, Z. Hossain, S. K. Dhar, K. V. Gopalakrishnar, L. C. Gupta, C. Godart, B. D. Padalia, and R. Vijayaraghavan, Phys. Rev. Lett. 72, 274 (1994).

[c7] T. E. Grigereit, J. W. Lynn, Q. Huang, A. Santoro, R. J. Cava, J. J. Krajewski, and W. F. Peck, Jr., Phys. Rev. Lett. 73, 2756 (1994).

[c8] D. R. Sanchez, H. Micklitz, M. B. Fontes, S. L. Bud'ko, and E. Baggio-Saitovitch, Phys. Rev. Lett. 76, 507 (1996).

[c9] R. Hoffman and C. Zheng, J. Phys. Chem. 89, 4175 (1985), and references therein.

[c10] C. Huhnt, G. Michels, M. Roepke, W. Schlabitz, A. Wurth, D. Johrendt, and A. Mewis, Physica (Amsterdam) 240B, 26 (1997).

[c11] A. Wurth, D. Johrendt, A. Mewis, C. Huhnt, G. Michels, M. Roepke, and W. Schlabitz, Z. Anorg. Allg. Chem. 623, 1418 (1997).

[c12] C. Huhnt, W. Schlabitz, A. Wurth, A. Mewis, and M. Reehuis, Phys. Rev. B (to be published).

[c13] M. Reehuis, G. Kotzyba, B. Zimmer, W. Jeitschko, and X. Hu, J. Alloys. Compd. (to be published).

[c14] R. Marchand and W. Jeitschko, J. Solid State Chem. 24, 351 (1978).

[c15] J. S. Schilling, U. F. Klein, and W. B. Holzapfel, Rev. Sci. Instrum. 45, 1353 (1974).

[c16] G. Gilat and I. Nowik, Phys. Rev. 130, 1361 (1963).

[c17] D. Johrendt, C. Felser, O. Jepsen, O. K. Anderson, A. Mewis, and J. Rouxel, J. Solid State Chem. (to be published).

[c18] M. Reehuis, P. J. Brown, W. Jeitschko, M. H. Möller, and T. Vomhof, J. Phys. Chem. Solids 54, 469 (1993).

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Pressure-induced Transition of the Sublattice Magnetization in ${EuCo}_{2} P_{2}$ : Change from Local Moment $Eu (4 f)$ to Itinerant $Co (3 d)$ Magnetism

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Pressure-induced Transition of the Sublattice Magnetization in EuCo2P2: Change from Local Moment Eu(4f) to Itinerant Co(3d) Magnetism

Abstract

References (18)

Pressure-induced Transition of the Sublattice Magnetization in ${EuCo}_{2} P_{2}$ : Change from Local Moment $Eu (4 f)$ to Itinerant $Co (3 d)$ Magnetism