Spin Glass State and Griffiths Phase in van der Waals Ferromagnetic Material Fe<sub>5</sub>GeTe<sub>2</sub>
The discovery of two-dimensional (2D) van der Waals ferromagnetic materials opens up new avenues for making devices with high information storage density, ultra-fast response, high integration, and low power consumption. Fe<sub>5</sub>GeTe<sub>2</sub> has attracted much atten...
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2024-12-01
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| Online Access: | https://www.mdpi.com/2079-4991/15/1/19 |
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| author | Jiaqi He Yuan Cao Yu Zou Mengyuan Liu Jia Wang Wenliang Zhu Minghu Pan |
| author_facet | Jiaqi He Yuan Cao Yu Zou Mengyuan Liu Jia Wang Wenliang Zhu Minghu Pan |
| author_sort | Jiaqi He |
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| description | The discovery of two-dimensional (2D) van der Waals ferromagnetic materials opens up new avenues for making devices with high information storage density, ultra-fast response, high integration, and low power consumption. Fe<sub>5</sub>GeTe<sub>2</sub> has attracted much attention because of its ferromagnetic transition temperature near room temperature. However, the investigation of its phase transition is rare until now. Here, we have successfully synthesized a single crystal of the layered ferromagnet Fe<sub>5</sub>GeTe<sub>2</sub> by chemical vapor phase transport, soon after characterized by X-ray diffraction (XRD), DC magnetization M(T), and isotherm magnetization M(H) measurements. A paramagnetic to ferromagnetic transition is observed at ≈302 K (<i>T</i><sub>C</sub>) in the temperature dependence of the DC magnetic susceptibility of Fe<sub>5</sub>GeTe<sub>2</sub>. We found an unconventional potential spin glass state in the low-temperature regime that differs from the conventional spin glass states and Griffiths phase (GP) in the high-temperature regime. The physical mechanisms behind the potential spin glass state of Fe<sub>5</sub>GeTe<sub>2</sub> at low temperatures and the Griffith phase at high temperatures need to be further investigated. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj-art-89035913982e4c4da0037ee70f4102ba2025-01-10T13:19:16ZengMDPI AGNanomaterials2079-49912024-12-011511910.3390/nano15010019Spin Glass State and Griffiths Phase in van der Waals Ferromagnetic Material Fe<sub>5</sub>GeTe<sub>2</sub>Jiaqi He0Yuan Cao1Yu Zou2Mengyuan Liu3Jia Wang4Wenliang Zhu5Minghu Pan6School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, ChinaSchool of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, ChinaSchool of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, ChinaSchool of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, ChinaSchool of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, ChinaSchool of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, ChinaSchool of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, ChinaThe discovery of two-dimensional (2D) van der Waals ferromagnetic materials opens up new avenues for making devices with high information storage density, ultra-fast response, high integration, and low power consumption. Fe<sub>5</sub>GeTe<sub>2</sub> has attracted much attention because of its ferromagnetic transition temperature near room temperature. However, the investigation of its phase transition is rare until now. Here, we have successfully synthesized a single crystal of the layered ferromagnet Fe<sub>5</sub>GeTe<sub>2</sub> by chemical vapor phase transport, soon after characterized by X-ray diffraction (XRD), DC magnetization M(T), and isotherm magnetization M(H) measurements. A paramagnetic to ferromagnetic transition is observed at ≈302 K (<i>T</i><sub>C</sub>) in the temperature dependence of the DC magnetic susceptibility of Fe<sub>5</sub>GeTe<sub>2</sub>. We found an unconventional potential spin glass state in the low-temperature regime that differs from the conventional spin glass states and Griffiths phase (GP) in the high-temperature regime. The physical mechanisms behind the potential spin glass state of Fe<sub>5</sub>GeTe<sub>2</sub> at low temperatures and the Griffith phase at high temperatures need to be further investigated.https://www.mdpi.com/2079-4991/15/1/19Fe<sub>5</sub>GeTe<sub>2</sub>spin glass stateGriffith phase |
| spellingShingle | Jiaqi He Yuan Cao Yu Zou Mengyuan Liu Jia Wang Wenliang Zhu Minghu Pan Spin Glass State and Griffiths Phase in van der Waals Ferromagnetic Material Fe<sub>5</sub>GeTe<sub>2</sub> Nanomaterials Fe<sub>5</sub>GeTe<sub>2</sub> spin glass state Griffith phase |
| title | Spin Glass State and Griffiths Phase in van der Waals Ferromagnetic Material Fe<sub>5</sub>GeTe<sub>2</sub> |
| title_full | Spin Glass State and Griffiths Phase in van der Waals Ferromagnetic Material Fe<sub>5</sub>GeTe<sub>2</sub> |
| title_fullStr | Spin Glass State and Griffiths Phase in van der Waals Ferromagnetic Material Fe<sub>5</sub>GeTe<sub>2</sub> |
| title_full_unstemmed | Spin Glass State and Griffiths Phase in van der Waals Ferromagnetic Material Fe<sub>5</sub>GeTe<sub>2</sub> |
| title_short | Spin Glass State and Griffiths Phase in van der Waals Ferromagnetic Material Fe<sub>5</sub>GeTe<sub>2</sub> |
| title_sort | spin glass state and griffiths phase in van der waals ferromagnetic material fe sub 5 sub gete sub 2 sub |
| topic | Fe<sub>5</sub>GeTe<sub>2</sub> spin glass state Griffith phase |
| url | https://www.mdpi.com/2079-4991/15/1/19 |
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