Ultrasonic Study of Thermal hysteresis in Helical antiferromagnetic Dy
High-resolution ultrasonic mechanical spectroscopy technique has been used to study the nature and dynamics of lattice defects and magnetic domain walls in the helical-type antiferromagnetic phase during thermal cycling of polycrystalline Dy samples between 80 and 210K. Effects of the lowest tempera...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2018-07-01
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| Series: | Reviews on Advanced Materials Science |
| Online Access: | https://doi.org/10.1515/rams-2018-0069 |
| _version_ | 1818718292340113408 |
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| author | Liubimova Iu. Sapozhnikov K. Nikolaev V. Corró M.-Li Kustov S. |
| author_facet | Liubimova Iu. Sapozhnikov K. Nikolaev V. Corró M.-Li Kustov S. |
| author_sort | Liubimova Iu. |
| collection | DOAJ |
| description | High-resolution ultrasonic mechanical spectroscopy technique has been used to study the nature and dynamics of lattice defects and magnetic domain walls in the helical-type antiferromagnetic phase during thermal cycling of polycrystalline Dy samples between 80 and 210K. Effects of the lowest temperature of thermal cycles, applied magnetic field and cooling/ heating rate on the ultrasonic absorption and Young´s modulus have been investigated. A strong influence of cooling/heating rate on the ultrasonic absorption is found over the temperature range between the Néel temperature, ca. 178K, and approximately 145K, confirming the existence of a new category of magnetomechanical damping - transitory ultrasonic absorption related to translational motion of domain walls. A strong increase of the ultrasonic absorption below approximately 140K is attributed to the formation of nuclei of ferromagnetic phase, presumably stabilized by such lattice defects as dislocations. The effect of applied magnetic field on ultrasonic absorption also emerges below 140K and is ascribed to the appearance of the net magnetization due to ferromagnetic nuclei. We argue that these nuclei are responsible for the controversial thermal hysteresis of elastic and anelastic properties, which is strongly promoted by decreasing the temperature of thermal cycles. |
| first_indexed | 2024-12-17T19:48:44Z |
| format | Article |
| id | doaj.art-ea015d830bb94a7d9dc9c05e4a0045ca |
| institution | Directory Open Access Journal |
| issn | 1605-8127 |
| language | English |
| last_indexed | 2024-12-17T19:48:44Z |
| publishDate | 2018-07-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Reviews on Advanced Materials Science |
| spelling | doaj.art-ea015d830bb94a7d9dc9c05e4a0045ca2022-12-21T21:34:48ZengDe GruyterReviews on Advanced Materials Science1605-81272018-07-0157224124510.1515/rams-2018-0069Ultrasonic Study of Thermal hysteresis in Helical antiferromagnetic DyLiubimova Iu.0Sapozhnikov K.1Nikolaev V.2Corró M.-Li3Kustov S.4ITMO University, Kronverksky pr. 49,St. Petersburg, 197101, RussiaITMO University, Kronverksky pr. 49,St. Petersburg, 197101, RussiaITMO University, Kronverksky pr. 49,St. Petersburg, 197101, RussiaDepartment of Physics, University of Balearic Islands, Cra. Valldemossa km 7.5, Palma de MallorcaE07122, SpainDepartment of Physics, University of Balearic Islands, Cra. Valldemossa km 7.5, Palma de MallorcaE07122, SpainHigh-resolution ultrasonic mechanical spectroscopy technique has been used to study the nature and dynamics of lattice defects and magnetic domain walls in the helical-type antiferromagnetic phase during thermal cycling of polycrystalline Dy samples between 80 and 210K. Effects of the lowest temperature of thermal cycles, applied magnetic field and cooling/ heating rate on the ultrasonic absorption and Young´s modulus have been investigated. A strong influence of cooling/heating rate on the ultrasonic absorption is found over the temperature range between the Néel temperature, ca. 178K, and approximately 145K, confirming the existence of a new category of magnetomechanical damping - transitory ultrasonic absorption related to translational motion of domain walls. A strong increase of the ultrasonic absorption below approximately 140K is attributed to the formation of nuclei of ferromagnetic phase, presumably stabilized by such lattice defects as dislocations. The effect of applied magnetic field on ultrasonic absorption also emerges below 140K and is ascribed to the appearance of the net magnetization due to ferromagnetic nuclei. We argue that these nuclei are responsible for the controversial thermal hysteresis of elastic and anelastic properties, which is strongly promoted by decreasing the temperature of thermal cycles.https://doi.org/10.1515/rams-2018-0069 |
| spellingShingle | Liubimova Iu. Sapozhnikov K. Nikolaev V. Corró M.-Li Kustov S. Ultrasonic Study of Thermal hysteresis in Helical antiferromagnetic Dy Reviews on Advanced Materials Science |
| title | Ultrasonic Study of Thermal hysteresis in Helical antiferromagnetic Dy |
| title_full | Ultrasonic Study of Thermal hysteresis in Helical antiferromagnetic Dy |
| title_fullStr | Ultrasonic Study of Thermal hysteresis in Helical antiferromagnetic Dy |
| title_full_unstemmed | Ultrasonic Study of Thermal hysteresis in Helical antiferromagnetic Dy |
| title_short | Ultrasonic Study of Thermal hysteresis in Helical antiferromagnetic Dy |
| title_sort | ultrasonic study of thermal hysteresis in helical antiferromagnetic dy |
| url | https://doi.org/10.1515/rams-2018-0069 |
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