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Dostęp zamkniętySpin glass behavior and colossal negative magnetoresistance of the p−Zn1−xMnxTe strongly doped with phosphorus
| cris.lastimport.scopus | 2024-02-12T20:51:06Z |
| dc.abstract.en | Magnetoresistance, ac and dc magnetization, and photoluminescence (PL) experiments have been performed on the-type Zn0.99Mn0.01Te and Zn0.97Mn 0,03Te alloys strongly doped with phosphorus (P). The investigated samples exhibit spinglass behavior with ferromagnetic regions near the freezing temperature Tf=1.9 K and colossal negative magnetoresistance (negMR) of 2.2×103 times at 4.2 K for 0≤B≤±6 T. The negMR curves contain occurrences of hysteresis providing evidence for the memory effect. Looking for possible ferromagnetic interactions responsible for the spin glass behavior at low hole densities, we observe in PL spectra that the P doping quenches internal recombination in Mn2+ ions. This strongly indicates a charge transfer between Mn2+ and P2− ions leading to the creation of Mn3+ and P3− ions. The creation of Mn3+ is confirmed by an observation of strong PL enhancement at excitation energies lower than the band gap and PL study at various temperatures. The resulting simultaneous existence of the mixed valence Mn2+ and Mn3+ ions can lead to double exchange mechanism of ferromagnetic interaction. Also, Mn3+ ions can exhibit a superexchange interaction leading to local ferromagnetic phases. |
| dc.affiliation | Uniwersytet Warszawski |
| dc.contributor.author | Le-Van, Khoi |
| dc.contributor.author | Dobrowolski, Witold |
| dc.contributor.author | Zawadzki, Włodzimierz |
| dc.contributor.author | Kazimierczuk, Tomasz |
| dc.contributor.author | Kossacki, Piotr |
| dc.contributor.author | Gałązka, Robert |
| dc.contributor.author | Rodek, Aleksander |
| dc.date.accessioned | 2024-01-26T07:56:59Z |
| dc.date.available | 2024-01-26T07:56:59Z |
| dc.date.issued | 2020 |
| dc.description.finance | Publikacja bezkosztowa |
| dc.description.number | 5 |
| dc.description.volume | 101 |
| dc.identifier.doi | 10.1103/PHYSREVB.101.054440 |
| dc.identifier.issn | 2469-9950 |
| dc.identifier.uri | https://repozytorium.uw.edu.pl//handle/item/120389 |
| dc.identifier.weblink | https://link.aps.org/article/10.1103/PhysRevB.101.054440 |
| dc.language | eng |
| dc.pbn.affiliation | physical sciences |
| dc.relation.ispartof | Physical Review B |
| dc.relation.pages | 54440-1-8 |
| dc.rights | ClosedAccess |
| dc.sciencecloud | nosend |
| dc.title | Spin glass behavior and colossal negative magnetoresistance of the p−Zn1−xMnxTe strongly doped with phosphorus |
| dc.type | JournalArticle |
| dspace.entity.type | Publication |