| Conţinutul numărului revistei |
| Articolul precedent |
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 SM ISO690:2012FELEA, Viorel, PRODAN, Lilian, ŞTEFANEŢ, Eric, CONG, Phamthan, ZHERLITSYN, S., TSURKAN, Vladimir. Ultrasound propagation in bond frustrated HgCr2S4 spinel in magnetic fields. In: Low Temperature Physics, 2017, vol. 43, pp. 559-563. ISSN 1063-777X. DOI: https://doi.org/10.1063/1.4985206 |
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  Low Temperature Physics |
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| Volumul 43 / 2017 / ISSN 1063-777X | ||||||
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| DOI:https://doi.org/10.1063/1.4985206 | ||||||
| Pag. 559-563 | ||||||
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Ultrasound and magnetization studies of bond frustrated spinel HgCr2S4 are performed as a function of temperature in static magnetic fields. Beside the anharmonic effect, the sound velocity shows pronounced anomaly at the antiferromagnetic (AFM) transition at TN = 23 K with an additional significant increase of the order of 0.5% indicating a strong spin-lattice coupling. External magnetic fields enhance the ferromagnetic (FM) correlations and shift the anomalies to lower temperatures concomitantly with the reduction of the Néel temperature. The constructed H-T phase diagram beside the long-range AFM states reveals the state with induced FM order and regimes with short-range AFM and FM correlations as well. |
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| Cuvinte-cheie Acoustic fields, Chromium compounds, Frequency modulation, Magnetic fields, Mercury compounds, Ultrasonic propagation |
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