TY - JOUR

T1 - Intrinsic ferromagnetism in Hg1-xFexSe (0.00012 ≤ x ≤ 0.0013) diluted magnetic semiconductor bulk single crystals at room temperature: Role of hybridization of impurity electronic states

AU - Govorkova, T.

AU - Okulov, V.

AU - Pamyatnykh, E.

AU - Vaulin, A.

AU - Gaviko, V.s.

AU - Surikov, V.

N1 - The work was supported by the Russian Science Foundation, Russia (Grant No.23-22-00126, https://rscf.ru/en/project/23-22-00126/). The authors are grateful to L.D. Paranchich (Chernivtsi National University, Ukraine) for providing single crystal ingots, and to A.F. Gubkin for help in magnetic measurements. X-ray diffraction studies and magnetic measurements were performed on equipment of the Collaborative Access Center “Testing Center of Nanotechnologies and Advanced Materials” of the Institute of Metal Physics (Ural Branch, Russian Academy of Sciences, Russia). We also express gratitude to the team of translators and proofreaders of the Laboratory for Scientific Translation by Natalya Popova (nauka-perevod.ru).

PY - 2024/1

Y1 - 2024/1

N2 - We investigate room-temperature structural properties and spontaneous magnetism in a series of Hg1-xFexSe (0.00012 ≤ x ≤ 0.0013) diluted magnetic semiconductor bulk single crystals grown by the Bridgman method. In order to elucidate the experimentally observed high-temperature magnetism in the studied systems, the dependencies of magnetization on magnetic field strength for the entire sample series were studied. Their detailed analysis revealed impurity contributions typical of ferromagnetic materials, which are described by magnetization curves with the parameters characterizing the spontaneous spin magnetism of the donor conduction electrons of the outer d-shells of the impurity atoms. According to the previously-developed theoretical concept, such a magnetic ordering mechanism stems from the direct exchange coupling of donor conduction electrons due to hybridization of impurity states, rather than from inter-impurity interactions. The results of optical emission spectroscopy and X-ray diffraction analysis confirmed the observed ferromagnetism to be intrinsic and linked directly to the d-electrons of iron impurity atoms.

AB - We investigate room-temperature structural properties and spontaneous magnetism in a series of Hg1-xFexSe (0.00012 ≤ x ≤ 0.0013) diluted magnetic semiconductor bulk single crystals grown by the Bridgman method. In order to elucidate the experimentally observed high-temperature magnetism in the studied systems, the dependencies of magnetization on magnetic field strength for the entire sample series were studied. Their detailed analysis revealed impurity contributions typical of ferromagnetic materials, which are described by magnetization curves with the parameters characterizing the spontaneous spin magnetism of the donor conduction electrons of the outer d-shells of the impurity atoms. According to the previously-developed theoretical concept, such a magnetic ordering mechanism stems from the direct exchange coupling of donor conduction electrons due to hybridization of impurity states, rather than from inter-impurity interactions. The results of optical emission spectroscopy and X-ray diffraction analysis confirmed the observed ferromagnetism to be intrinsic and linked directly to the d-electrons of iron impurity atoms.

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U2 - 10.1016/j.rinp.2023.107307

DO - 10.1016/j.rinp.2023.107307

M3 - Article

VL - 56

JO - Results in Physics

JF - Results in Physics

SN - 2211-3797

M1 - 107307

ER -