Search for ferromagnetism in Mn-doped lead halide perovskites
Abstract Lead halide perovskites are new key materials in various application areas such as high efficiency photovoltaics, lighting, and photodetectors. Doping with Mn, which is known to enhance the stability, has recently been reported to lead to ferromagnetism below 25 K in methylammonium lead iod...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-04-01
|
| Series: | Communications Physics |
| Online Access: | https://doi.org/10.1038/s42005-023-01178-0 |
| _version_ | 1797841044824391680 |
|---|---|
| author | Maryam Sajedi Chen Luo Konrad Siemensmeyer Maxim Krivenkov Kai Chen James M. Taylor Marion A. Flatken Florin Radu Oliver Rader |
| author_facet | Maryam Sajedi Chen Luo Konrad Siemensmeyer Maxim Krivenkov Kai Chen James M. Taylor Marion A. Flatken Florin Radu Oliver Rader |
| author_sort | Maryam Sajedi |
| collection | DOAJ |
| description | Abstract Lead halide perovskites are new key materials in various application areas such as high efficiency photovoltaics, lighting, and photodetectors. Doping with Mn, which is known to enhance the stability, has recently been reported to lead to ferromagnetism below 25 K in methylammonium lead iodide (MAPbI3) mediated by superexchange. Two most recent reports confirm ferromagnetism up to room temperature but mediated by double exchange between Mn2+ and Mn3+ ions. Here we investigate a wide concentration range of MAMn x Pb1−x I3 and Mn-doped triple-cation thin films by soft X-ray absorption, X-ray magnetic circular dichroism, and quantum interference device magnetometry. The X-ray absorption lineshape shows clearly an almost pure Mn2+ configuration, confirmed by a sum-rule analysis of the dichroism spectra. A remanent magnetization is not observed down to 2 K. Curie-Weiss fits to the magnetization yield negative Curie temperatures. All data show consistently that significant double exchange and ferromagnetism do not occur. Our results show that Mn is not suitable for creating ferromagnetism in lead halide perovskites. |
| first_indexed | 2024-04-09T16:24:35Z |
| format | Article |
| id | doaj.art-eb8b9796384d4d2f93ed5feb671d9512 |
| institution | Directory Open Access Journal |
| issn | 2399-3650 |
| language | English |
| last_indexed | 2024-04-09T16:24:35Z |
| publishDate | 2023-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Physics |
| spelling | doaj.art-eb8b9796384d4d2f93ed5feb671d95122023-04-23T11:19:37ZengNature PortfolioCommunications Physics2399-36502023-04-01611810.1038/s42005-023-01178-0Search for ferromagnetism in Mn-doped lead halide perovskitesMaryam Sajedi0Chen Luo1Konrad Siemensmeyer2Maxim Krivenkov3Kai Chen4James M. Taylor5Marion A. Flatken6Florin Radu7Oliver Rader8Helmholtz-Zentrum Berlin für Materialien und EnergieHelmholtz-Zentrum Berlin für Materialien und EnergieHelmholtz-Zentrum Berlin für Materialien und EnergieHelmholtz-Zentrum Berlin für Materialien und EnergieHelmholtz-Zentrum Berlin für Materialien und EnergieHelmholtz-Zentrum Berlin für Materialien und EnergieHelmholtz-Zentrum Berlin für Materialien und EnergieHelmholtz-Zentrum Berlin für Materialien und EnergieHelmholtz-Zentrum Berlin für Materialien und EnergieAbstract Lead halide perovskites are new key materials in various application areas such as high efficiency photovoltaics, lighting, and photodetectors. Doping with Mn, which is known to enhance the stability, has recently been reported to lead to ferromagnetism below 25 K in methylammonium lead iodide (MAPbI3) mediated by superexchange. Two most recent reports confirm ferromagnetism up to room temperature but mediated by double exchange between Mn2+ and Mn3+ ions. Here we investigate a wide concentration range of MAMn x Pb1−x I3 and Mn-doped triple-cation thin films by soft X-ray absorption, X-ray magnetic circular dichroism, and quantum interference device magnetometry. The X-ray absorption lineshape shows clearly an almost pure Mn2+ configuration, confirmed by a sum-rule analysis of the dichroism spectra. A remanent magnetization is not observed down to 2 K. Curie-Weiss fits to the magnetization yield negative Curie temperatures. All data show consistently that significant double exchange and ferromagnetism do not occur. Our results show that Mn is not suitable for creating ferromagnetism in lead halide perovskites.https://doi.org/10.1038/s42005-023-01178-0 |
| spellingShingle | Maryam Sajedi Chen Luo Konrad Siemensmeyer Maxim Krivenkov Kai Chen James M. Taylor Marion A. Flatken Florin Radu Oliver Rader Search for ferromagnetism in Mn-doped lead halide perovskites Communications Physics |
| title | Search for ferromagnetism in Mn-doped lead halide perovskites |
| title_full | Search for ferromagnetism in Mn-doped lead halide perovskites |
| title_fullStr | Search for ferromagnetism in Mn-doped lead halide perovskites |
| title_full_unstemmed | Search for ferromagnetism in Mn-doped lead halide perovskites |
| title_short | Search for ferromagnetism in Mn-doped lead halide perovskites |
| title_sort | search for ferromagnetism in mn doped lead halide perovskites |
| url | https://doi.org/10.1038/s42005-023-01178-0 |
| work_keys_str_mv | AT maryamsajedi searchforferromagnetisminmndopedleadhalideperovskites AT chenluo searchforferromagnetisminmndopedleadhalideperovskites AT konradsiemensmeyer searchforferromagnetisminmndopedleadhalideperovskites AT maximkrivenkov searchforferromagnetisminmndopedleadhalideperovskites AT kaichen searchforferromagnetisminmndopedleadhalideperovskites AT jamesmtaylor searchforferromagnetisminmndopedleadhalideperovskites AT marionaflatken searchforferromagnetisminmndopedleadhalideperovskites AT florinradu searchforferromagnetisminmndopedleadhalideperovskites AT oliverrader searchforferromagnetisminmndopedleadhalideperovskites |