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| Author | Franco, D.G.; Geibel, C. | ||||
| Title | Synthesis and study of the chiral magnetic system EuIr2P2 | Type | Journal Article | ||
| Year | 2021 | Publication | Physical Review B | Abbreviated Journal | Phys. Rev. B |
| Volume | 104 | Issue | Pages | 054416 | |
| Keywords | Frustrated magnetism; Antiferromagnets; Specific heat; X-ray diffraction | ||||
| Abstract | Chiral materials, where no improper symmetry operations such as inversion are resent, are systems prone to the appearance of a skyrmion lattice. Recently it has been shown theoretically that not only ferromagnets (FMs) but also antiferromagnets (AFMs) can host such kind of phases. In this work we study a new candidate for AFM skyrmions, EuIr2P2, by means of magnetization and specific heat measurements on poly and single crystals. X-ray diffraction confirms a trigonal chiral crystal structure, where europium ions form helices along the c direction. In spite of predominantly FM interactions, Eu2+ ions order antiferromagnetically at TN1=5 K in what seems to be an incommensurate amplitude-modulated magnetic state where the moments are oriented mainly along the c direction. A second magnetic transition takes place at TN2=2.9 K, involving the ordering of an in-plane component of the Eu moment likely resulting in an equal-moment structure. Specific heat data show a tail above TN1. Accordingly the magnetic entropy at TN1 is strongly reduced in comparison to the expected Rln8 value. This evidences a significant amount of frustration. A simple analysis based on a Heisenberg model indicates that the observed properties imply the presence of several relevant interactions, with competing FM and AFM ones resulting in frustration. Thus EuIr2P2 is a new interesting magnetic system, where chirality and frustration might result in unconventional magnetic textures. |
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| ISSN | 2469-9950 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | BT @ pedrazp @ | Serial | 877 | ||
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