Effect of a magnetic field on the intermediate phase in Mn1–xFexSi: Spin-liquid versus fluctuations scenario
We report results of the magnetic field influence on the chiral spin liquid state in Mn 1– x Fe x Si 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...
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Veröffentlicht in: | JETP letters 2016-03, Vol.103 (5), p.321-327 |
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Hauptverfasser: | , , , , , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | We report results of the magnetic field influence on the chiral spin liquid state in Mn
1–
x
Fe
x
Si 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
T
SP
increases with magnetic field logarithmically,
T
SP
~ 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. |
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ISSN: | 0021-3640 1090-6487 |
DOI: | 10.1134/S0021364016050027 |