Magnetism of α-Cr2O3 epitaxial structures grown on sapphire by the mist-CVD method

Standard

Magnetism of α-Cr2O3 epitaxial structures grown on sapphire by the mist-CVD method. / Kharitonskiǐ, P.V.; Nikolaev, V.I.; Timashov, R.B.; Stepanov, A.I.; Sergienko, E.S.; Gareev, K.G.; Ralin, A.Y.

In: Chin. J. Phys., Vol. 98, 14.09.2025, p. 203-211.

Research output: Contribution to journal › Article › peer-review

Author

Kharitonskiǐ, P.V. ; Nikolaev, V.I. ; Timashov, R.B. ; Stepanov, A.I. ; Sergienko, E.S. ; Gareev, K.G. ; Ralin, A.Y. / Magnetism of α-Cr2O3 epitaxial structures grown on sapphire by the mist-CVD method. In: Chin. J. Phys. 2025 ; Vol. 98. pp. 203-211.

BibTeX

@article{809746dcb0bc45ee9b3524be50593f6b,

title = "Magnetism of α-Cr2O3 epitaxial structures grown on sapphire by the mist-CVD method",

abstract = "The magnetic properties of α-Cr2O3 structures grown on a sapphire substrate by ultrasonic chemical vapor deposition (mist-CVD epitaxy) have been studied. Three samples have been fabricated. The first of them is very thin and contains only separate small crystallites (islands in the epitaxy plane). The second is a flat layer of submicron thickness, and the third is an analogue of the second layer with randomly attached hexagonal crystallites outside the epitaxial plane. The island structure represents a dilute ferrimagnet. To evaluate the size distribution of crystallites of the island structure, histograms were constructed, which allow assuming a lognormal type of distribution with an average crystallite size of approximately 300 nm. Based on the measured magnetic hysteresis parameters and micromagnetic modeling, estimates for the effective spontaneous magnetizations of the island structure were obtained: for saturation (40–120 kA/m) and saturation remanence (3–8 kA/m). It was shown that the magnetic ordering of the epitaxial layers is close to a weak ferromagnet type, while the island epitaxial structure appears close to a ferrimagnet. {\textcopyright} 2025 Elsevier B.V., All rights reserved.",

keywords = "Antiferromagnetism, Chemical vapor deposition, Chromium oxide, Ferrimagnetism, Micromagnetic modeling, Weak ferromagnetism",

author = "P.V. Kharitonskiǐ and V.I. Nikolaev and R.B. Timashov and A.I. Stepanov and E.S. Sergienko and K.G. Gareev and A.Y. Ralin",

note = "Export Date: 01 November 2025; Cited By: 0; Correspondence Address: A.Y. Ralin; Far Eastern Federal University, Vladivostok, 690922, Russian Federation; email: ralin.ayu@dvfu.ru",

year = "2025",

month = sep,

day = "14",

doi = "10.1016/j.cjph.2025.09.015",

language = "Английский",

volume = "98",

pages = "203--211",

journal = "Chinese Journal of Physics",

issn = "0577-9073",

publisher = "Physical Society of the Republic of China",

}

RIS

TY - JOUR

T1 - Magnetism of α-Cr2O3 epitaxial structures grown on sapphire by the mist-CVD method

AU - Kharitonskiǐ, P.V.

AU - Nikolaev, V.I.

AU - Timashov, R.B.

AU - Stepanov, A.I.

AU - Sergienko, E.S.

AU - Gareev, K.G.

AU - Ralin, A.Y.

N1 - Export Date: 01 November 2025; Cited By: 0; Correspondence Address: A.Y. Ralin; Far Eastern Federal University, Vladivostok, 690922, Russian Federation; email: ralin.ayu@dvfu.ru

PY - 2025/9/14

Y1 - 2025/9/14

N2 - The magnetic properties of α-Cr2O3 structures grown on a sapphire substrate by ultrasonic chemical vapor deposition (mist-CVD epitaxy) have been studied. Three samples have been fabricated. The first of them is very thin and contains only separate small crystallites (islands in the epitaxy plane). The second is a flat layer of submicron thickness, and the third is an analogue of the second layer with randomly attached hexagonal crystallites outside the epitaxial plane. The island structure represents a dilute ferrimagnet. To evaluate the size distribution of crystallites of the island structure, histograms were constructed, which allow assuming a lognormal type of distribution with an average crystallite size of approximately 300 nm. Based on the measured magnetic hysteresis parameters and micromagnetic modeling, estimates for the effective spontaneous magnetizations of the island structure were obtained: for saturation (40–120 kA/m) and saturation remanence (3–8 kA/m). It was shown that the magnetic ordering of the epitaxial layers is close to a weak ferromagnet type, while the island epitaxial structure appears close to a ferrimagnet. © 2025 Elsevier B.V., All rights reserved.

AB - The magnetic properties of α-Cr2O3 structures grown on a sapphire substrate by ultrasonic chemical vapor deposition (mist-CVD epitaxy) have been studied. Three samples have been fabricated. The first of them is very thin and contains only separate small crystallites (islands in the epitaxy plane). The second is a flat layer of submicron thickness, and the third is an analogue of the second layer with randomly attached hexagonal crystallites outside the epitaxial plane. The island structure represents a dilute ferrimagnet. To evaluate the size distribution of crystallites of the island structure, histograms were constructed, which allow assuming a lognormal type of distribution with an average crystallite size of approximately 300 nm. Based on the measured magnetic hysteresis parameters and micromagnetic modeling, estimates for the effective spontaneous magnetizations of the island structure were obtained: for saturation (40–120 kA/m) and saturation remanence (3–8 kA/m). It was shown that the magnetic ordering of the epitaxial layers is close to a weak ferromagnet type, while the island epitaxial structure appears close to a ferrimagnet. © 2025 Elsevier B.V., All rights reserved.

KW - Antiferromagnetism

KW - Chemical vapor deposition

KW - Chromium oxide

KW - Ferrimagnetism

KW - Micromagnetic modeling

KW - Weak ferromagnetism

UR - https://www.mendeley.com/catalogue/8a5e16b7-b1ea-3418-9033-b9fff15d2606/

U2 - 10.1016/j.cjph.2025.09.015

DO - 10.1016/j.cjph.2025.09.015

M3 - статья

VL - 98

SP - 203

EP - 211

JO - Chinese Journal of Physics

JF - Chinese Journal of Physics

SN - 0577-9073

ER -

ID: 143195592