Loading...
Please wait, while we are loading the content...
Electronic states of magnetic refrigerator materials Mn0.9Fe1.1P0.55As0.45using soft x-ray magnetic circular dichroism
| Content Provider | Scilit |
|---|---|
| Author | Takeda, Y. Okane, T. Ohkochi, T. Fujimori, S. -I Saitoh, Y. Yamagami, H. Yabuta, Hisato Takabatake, T. |
| Copyright Year | 2010 |
| Description | Journal: Journal of Physics: Conference Series The system of $MnFeP_{1−x}As_{x}$ is a candidate of a magnetic refrigerator material. We have investigated the temperature (T)- and magnetic field (H)-dependence of the magnetic properties of the Mn and Fe ions for $Mn_{0.9}Fe_{1.1}P_{0.55}As_{0.45}$ using a soft x-ray magnetic circular dichroism (XMCD) in the regions of the Mn and Fe $L_{2,3}$ absorption edges. In the ferromagnetic states, the magnetic moments of the Mn and Fe ions turn to the same direction. It is considered that the Mn ions are close to divalent $(Mn^{2+}$) states and that the Fe ions are a mixture of trivalent $(Fe^{3+}$) and divalent $(Fe^{2+}$) states. However, we deduce that the ferromagnetic properties of the Fe ions are mainly derived from the $Fe^{2+}$ states. Using the XMCD sum rules, we have found that the magnitude of the magnetic moment of the Mn ions is larger than that of the Fe ions. The paramagnetic to ferromagnetic transitions are clearly observed by the T- and H- dependent XMCD measurements. Scince the shapes of the spectra don't change in all experiment conditions, the electronic configurations of the Mn and Fe ions are not changed by the PM-FM transition. |
| Related Links | http://iopscience.iop.org/article/10.1088/1742-6596/200/1/012199/pdf |
| ISSN | 17426588 |
| e-ISSN | 17426596 |
| DOI | 10.1088/1742-6596/200/1/012199 |
| Journal | Journal of Physics: Conference Series |
| Issue Number | 1 |
| Volume Number | 200 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2010-01-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Physics: Conference Series Condensed Matter Physics Magnetic Field Magnetic Circular Dichroism Magnetic Properties Magnetic Moment |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physics and Astronomy |
