Magnetic and structural phase transitions of MnBi under high magnetic fields
High-field x-ray diffraction and magnetization measurements and differential thermal analysis (DTA) were carried out for polycrystalline MnBi with an NiAs-type hexagonal structure to investigate its magnetic and structural phase transitions. The lattice parameter a rapidly decreases below the spin r...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2008-01-01
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| Series: | Science and Technology of Advanced Materials |
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| Online Access: | http://www.iop.org/EJ/abstract/1468-6996/9/2/024204 |
| _version_ | 1819068699373469696 |
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| author | Keiichi Koyama, Yoshifuru Mitsui and Kazuo Watanabe |
| author_facet | Keiichi Koyama, Yoshifuru Mitsui and Kazuo Watanabe |
| author_sort | Keiichi Koyama, Yoshifuru Mitsui and Kazuo Watanabe |
| collection | DOAJ |
| description | High-field x-ray diffraction and magnetization measurements and differential thermal analysis (DTA) were carried out for polycrystalline MnBi with an NiAs-type hexagonal structure to investigate its magnetic and structural phase transitions. The lattice parameter a rapidly decreases below the spin reorientation temperature TSR(=90 K) in a zero magnetic field. The parameter c decreases gradually with decreasing temperature and exhibits an anomaly in the vicinity of TSR. By applying a magnetic field of 5 T, the parameter a increases by ~0.05% when T<TSR and varies smoothly when 8≤T≤300 K. DTA data show that the magnetic phase transition temperature from the ferromagnetic state to the paramagnetic state increases linearly at a rate of 2 KT−1 with increasing magnetic field up to 14 T. |
| first_indexed | 2024-12-21T16:38:18Z |
| format | Article |
| id | doaj.art-b621e716e9f14b13affd2f85321f37ca |
| institution | Directory Open Access Journal |
| issn | 1468-6996 1878-5514 |
| language | English |
| last_indexed | 2024-12-21T16:38:18Z |
| publishDate | 2008-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Science and Technology of Advanced Materials |
| spelling | doaj.art-b621e716e9f14b13affd2f85321f37ca2022-12-21T18:57:11ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142008-01-0192024204Magnetic and structural phase transitions of MnBi under high magnetic fieldsKeiichi Koyama, Yoshifuru Mitsui and Kazuo WatanabeHigh-field x-ray diffraction and magnetization measurements and differential thermal analysis (DTA) were carried out for polycrystalline MnBi with an NiAs-type hexagonal structure to investigate its magnetic and structural phase transitions. The lattice parameter a rapidly decreases below the spin reorientation temperature TSR(=90 K) in a zero magnetic field. The parameter c decreases gradually with decreasing temperature and exhibits an anomaly in the vicinity of TSR. By applying a magnetic field of 5 T, the parameter a increases by ~0.05% when T<TSR and varies smoothly when 8≤T≤300 K. DTA data show that the magnetic phase transition temperature from the ferromagnetic state to the paramagnetic state increases linearly at a rate of 2 KT−1 with increasing magnetic field up to 14 T.http://www.iop.org/EJ/abstract/1468-6996/9/2/024204MnBihigh-field x-ray diffractiondifferential thermal analysishigh magnetic fields |
| spellingShingle | Keiichi Koyama, Yoshifuru Mitsui and Kazuo Watanabe Magnetic and structural phase transitions of MnBi under high magnetic fields Science and Technology of Advanced Materials MnBi high-field x-ray diffraction differential thermal analysis high magnetic fields |
| title | Magnetic and structural phase transitions of MnBi under high magnetic fields |
| title_full | Magnetic and structural phase transitions of MnBi under high magnetic fields |
| title_fullStr | Magnetic and structural phase transitions of MnBi under high magnetic fields |
| title_full_unstemmed | Magnetic and structural phase transitions of MnBi under high magnetic fields |
| title_short | Magnetic and structural phase transitions of MnBi under high magnetic fields |
| title_sort | magnetic and structural phase transitions of mnbi under high magnetic fields |
| topic | MnBi high-field x-ray diffraction differential thermal analysis high magnetic fields |
| url | http://www.iop.org/EJ/abstract/1468-6996/9/2/024204 |
| work_keys_str_mv | AT keiichikoyamayoshifurumitsuiandkazuowatanabe magneticandstructuralphasetransitionsofmnbiunderhighmagneticfields |