Effect of a magnetic field on the intermediate phase in Mn1–x Fe x Si: Spin-liquid versus fluctuations scenario
| Autor: | T. V. Ischenko, V. V. Glushkov, Erik Čižmár, S. V. Demishev, N. E. Sluchanko, N. A. Samarin, Vadim Dyadkin, N. M. Chubova, S. V. Grigoriev, V. Yu. Ivanov, I. I. Lobanova, Karol Flachbart, Slavomír Gabáni, A. V. Bogach |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Physics and Astronomy (miscellaneous) Condensed matter physics Magnetoresistance 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetic susceptibility Magnetic field Paramagnetism Ferromagnetism Critical point (thermodynamics) Quantum critical point 0103 physical sciences Quantum spin liquid 010306 general physics 0210 nano-technology |
| Zdroj: | JETP Letters. 103:321-327 |
| ISSN: | 1090-6487 0021-3640 |
| DOI: | 10.1134/s0021364016050027 |
| Popis: | We report results of the magnetic field influence on the chiral spin liquid state in Mn1–xFexSi single crystal with iron content x = 0.108 in proximity of a hidden quantum critical point. The use of small angle neutron scattering data together with magnetic susceptibility measurements down to 0.4 K and precise magnetoresistance measurements in the temperature range 2–20 K in magnetic field up to 5 T allowed us to construct the magnetic phase diagram of this compound in which at low magnetic fields B < 0.15 T an intermediate phase with short-range magnetic order exists in a wide temperature range 0.62 K < T < 9.1 K. It was found that the increase in magnetic field first results in the suppression of a transition to the spiral phase with long-range magnetic order at very low temperatures, and then induces a transition of the intermediate phase to a spin-polarized (ferromagnetic) phase with lowering temperature. The temperature of this transition TSP increases with magnetic field logarithmically, TSP ~ log(B), and results in formation of a singular point on the magnetic phase diagram located at T ~ 8.5 K and B ~ 3.5 T, which may be either a triple or a critical point. The possible spin-liquid nature of the intermediate phase is discussed. |
| Databáze: | OpenAIRE |
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