Emergent Griffiths-phase-like behavior in the ball-milled nanocrystalline Dy4RhAl and its implication
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866910409549676544 |
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| author | Iyer, Kartik K Maiti, Kalobaran Rayaprol, S. Chalke, B A Sampathkumaran, E. V. |
| author_facet | Iyer, Kartik K Maiti, Kalobaran Rayaprol, S. Chalke, B A Sampathkumaran, E. V. |
| contents | We report the results of dc susceptibility and heat capacity measurements on the (ball-milled) nanocrystalline rare-earth (R) ternary compound, crystallizing in Gd4RhIn type, cubic Dy4RhAl compound. The bulk form of this compound has been known to undergo antiferromagnetic ordering at (TN=) 18 K with concomitant cluster spin glass anomalies. The present studies on the nano-form obtained by ball milling reveal that this antiferromagnetic ordering is suppressed with the reduction of particle size with no feature attributable to a well defined long-range magnetic ordering down to 1.8 K, but showing an inhomogeneous magnetism below 10 K. The point being stressed is that the results show the dominance of a feature around 30 K in the magnetic susceptibility data (well above TN of the bulk form) mimicking Griffiths phase. We infer that surface magnetism dominates before long range magnetic ordering occurs in this material. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_08956 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Emergent Griffiths-phase-like behavior in the ball-milled nanocrystalline Dy4RhAl and its implication Iyer, Kartik K Maiti, Kalobaran Rayaprol, S. Chalke, B A Sampathkumaran, E. V. Strongly Correlated Electrons Materials Science We report the results of dc susceptibility and heat capacity measurements on the (ball-milled) nanocrystalline rare-earth (R) ternary compound, crystallizing in Gd4RhIn type, cubic Dy4RhAl compound. The bulk form of this compound has been known to undergo antiferromagnetic ordering at (TN=) 18 K with concomitant cluster spin glass anomalies. The present studies on the nano-form obtained by ball milling reveal that this antiferromagnetic ordering is suppressed with the reduction of particle size with no feature attributable to a well defined long-range magnetic ordering down to 1.8 K, but showing an inhomogeneous magnetism below 10 K. The point being stressed is that the results show the dominance of a feature around 30 K in the magnetic susceptibility data (well above TN of the bulk form) mimicking Griffiths phase. We infer that surface magnetism dominates before long range magnetic ordering occurs in this material. |
| title | Emergent Griffiths-phase-like behavior in the ball-milled nanocrystalline Dy4RhAl and its implication |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2404.08956 |