Magnetic cluster developement in In1−x
                     MnxSb semiconductor alloys

Măgeruşan, Lidia; Deac, I. G.; Dorolti, E.; Coldea, M.; Rednic, Vasile; Neumann, M.

doi:10.2478/s11534-009-0140-7

Cited by 13 publications

(10 citation statements)

References 20 publications

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“…Basically, the MS-RT sample shows the highest and values, while the decrease of and incorporation of polymer lead to the decrease of the corresponding parameters. It should be noted, that previous studies of 30-nm MnSb nanoparticles reported emu/cm 50 , which is lower than the bulk MnSb value (about 700 emu/cm 33 , 34 ), but close to that for the MS-RT sample with similar mean crystallite size, while the value in our case is 1.5 times smaller than the one reported earlier 50 . For the sample MS-LT* we observed the lowest and values, while the rest of studied samples demonstrate closer values, in the range of 160–250 Oe, and ratio is in the range of 0.41–0.76.…”

Section: Resultssupporting

confidence: 58%

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Structural characterization and magnetic response of poly(p-xylylene)–MnSb and MnSb films deposited at cryogenic temperature

Oveshnikov

Zav’yalov

Trunkin

et al. 2021

Sci Rep

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In this study, we employed several experimental techniques to investigate structure and magnetic properties of poly(p-xylylene)–MnSb composites synthesized by low-temperature vapor deposition polymerization technique and MnSb films deposited at various temperatures. The presence of MnSb nanocrystallites in the studied films was verified by the results of X-ray diffraction, electron microscopy and Raman spectroscopy studies. The obtained data revealed the formation of Sb-rich sublayer with well-oriented Sb grains near the susbtrate, which seems to act as a buffer for the consequent poly(p-xylylene)–MnSb or MnSb layer growth. Increasing the polymer content results in qualitative change of surface morphology of studied films. At high polymer content the hybrid nanocomposite with MnSb nanoparticles embedded into poly(p-xylylene) matrix is formed. All investigated samples demonstrated detectable ferromagnetic response at room temperature, while the parameters of this response revealed a complex correlation with nominal composition, presented crystal phases and surface morphology of studied films. Estimated values of the Curie temperature of the samples are close to that of bulk MnSb.

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Section: Resultssupporting

confidence: 58%

“…Bulk MnSb is a FM semimetal with °C 31 , 32 and room temperature saturation magnetization emu/cm 33 , 34 . The increase of Mn atoms excess in the Mn Sb compound leads to the considerable decrease of and values 31 , 32 .…”

Section: Introductionmentioning

confidence: 99%

Structural characterization and magnetic response of poly(p-xylylene)–MnSb and MnSb films deposited at cryogenic temperature

Oveshnikov

Zav’yalov

Trunkin

et al. 2021

Sci Rep

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“…In fact, although the ab initio calculation has been used to obtain the In1-xMnxSb system properties in the entire range of compositions [7], experimentally it has been noted that manganese solubility in InSb is limited. InSb and MnSb thus form an eutectic [8], and the presence of clusters with manganese has been found in solid polycrystalline In1-xMnxSb solutions obtained by fusion of InSb with Mn [9,10] and by fusion of the constituent elements with argon arc [11].…”

Section: Introductionmentioning

confidence: 95%

“…On the one hand, obtaining In1-xMnxSb system alloys with high Mn concentrations has not been possible using techniques such as the fusion of InSb with Mn [9,10] or the fusion of the constituent elements with the argon arc [11]. On the other hand, the usefulness of a material in spintronic applications depends on its magnetic properties, which are closely related to its morphological, structural and thermal properties.…”

Section: Introductionmentioning

confidence: 99%

Structural and thermal properties of InSb:Mn with MnSb clusters

Rincón

González-Laprea

Oliveros

et al. 2022

J. Phys.: Conf. Ser.

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III-V family compounds doped with transition metals are promising materials for spintronic applications. Synthesis of an In0.9Mn0.1Sb ingot was thus carried out by direct fusion of the stoichiometric mixture of the constituent elements, followed by controlled cooling. The ingot obtained showed p-type conductivity. Scanning Electron Microscopy (SEM) images show MnSb clusters in an InSb matrix doped with Mn, a result like that found when the compound is obtained using other techniques. Energy-dispersive X-ray spectroscopy (EDS) shows that the atomic ratio of the clusters is Mn/Sb = 0.896 ± 0.025, while the atomic ratio of the matrix is In/Sb = 1.013 ± 0.005. The indexation of the powder X-ray diffraction pattern at room temperature yielded a majority cubic phase of InSb doped with Mn, with a lattice parameter a = 6.474173 Å and cell unit volume V = 271.36Å3 , while non-indexed reflections are associated with the presence of MnSb rich in Sb. The phase transition temperatures were obtained from differential thermal analysis (DTA) measurements on powder samples in evacuated quartz capsules. It can be observed that fusion of the InSb matrix doped with Mn occurs between 485 °C and 528 °C, unlike the congruent fusion of the InSb at 527.7 °C; while the fusion of the Sb-rich MnSb clusters occurs between 494 °C and 509 °C. These temperatures are lower than those reported for the Sb-rich side of the phase diagram of the Mn-Sb binary system, which shows a decrease in the thermal stability of the compounds. The estimated fusion enthalpies for InSb:Mn and antimony-rich MnSb are, respectively, 4.8 Kcal/mol and 117.4 Kcal/mol.

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“…There are many ways to prepare inhomogeneous and disordered solid-state systems. One of ways is based on applying two-component systems, in which components are characterized by a limited solubility and can form eutectic alloys [16][17][18].…”

Section: Introductionmentioning

confidence: 99%