Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
286 0 |
SM ISO690:2012 FELEA, Viorel, PRODAN, Lilian, ŞTEFANEŢ, Eric, CONG, Phamthan, ZHERLITSYN, S., TSURKAN, Vladimir. Ultrasound propagation in bond frustrated HgCr2S4 spinel in magnetic fields. In: Fizika Nizkikh Temperatur, 2017, vol. 43, pp. 702-706. ISSN 0132-6414. |
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Fizika Nizkikh Temperatur | ||||||
Volumul 43 / 2017 / ISSN 0132-6414 | ||||||
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Pag. 702-706 | ||||||
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Rezumat | ||||||
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. PACS: 43.35.+d Ultrasonics, quantum acoustics, and physical effects of sound; 62.65.+k Acoustical properties of solids; 72.55.+s Magnetoacoustic effects; 75.50.Ee Antiferromagnetics; 75.60.Jk Magnetization reversal mechanisms. |
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Cuvinte-cheie Geometrical frustration, H-T phase diagram, magnetization, Spinel |
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