scholarly journals Synthesis of bulk crystals and thin films of the ferromagnetic MnSb

2021 ◽  
Vol 23 (3) ◽  
pp. 387-395
Author(s):  
Muhammadyusuf Jaloliddinzoda ◽  
Sergey F. Marenkin ◽  
Alexey I. Ril’ ◽  
Mikhail G. Vasil’ev ◽  
Alexander D. Izotov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Curie Point ◽  
High Vacuum ◽  
Microstructural Analysis ◽  
Stoichiometric Composition ◽  
Deposition Process ◽  
Endothermic Effect ◽  
Magnetic Memory ◽  
Magnetic Field Sensors

High-temperature ferromagnets are widely used on a practical level. Based on them, magnetic memory for computers and various types of magnetic field sensors are created. Therefore, bulk ingots and thin-film samples of ferromagnet manganese antimonide (MnSb) with a high Curie point are of great interest, both from the practical and fundamental sides. Manganese antimonide films are obtained in hybrid structures using molecular-beam epitaxy. The thickness of the films does not exceed tens of nanometers. Despite their high sensitivity to magnetic fields, their small thickness prevents them from being used as magnetic field sensors. The aim of this work was to synthesise thick bulk ingots of manganese antimonide crystalsand films with a thickness of ~ 400 nm on sitall and silicon substrates. MnSb crystals were synthesised using the vacuum-ampoule method and identified using XRD, DTA, and microstructural analysis. The results of studies of bulk samples indicated the presence of an insignificant amount of antimony in additionto the MnSb phase. According to the DTA thermogram of the MnSb alloy, a small endothermic effect was observed at 572 °C, which corresponds to the melting of the eutectic on the part of antimony in the Mn-Sb system. Such composition, according to previous studies, guaranteed the production of manganese antimonide with the maximum Curie temperature. A study of the magnetic properties showed that the synthesised MnSb crystals were a soft ferromagnet with the Curie point ~ 587 K. Thin MnSb films were obtained by an original method using separate sequential deposition in a high vacuum of the Mnand Sb metals with their subsequent annealing. To optimise the process of obtaining films with stoichiometric composition, the dependences of the thickness of metal films on the parameters of the deposition process were calculated. The temperature range of annealing at which the metals interact with the formation of ferromagnetic MnSb films was established, the films were identified, and their electrical and magnetic properties were measured 

scholarly journals Unravelling the nature of magneto-electric coupling in room temperature multiferroic particulate (PbFe0.5Nb0.5O3)–(Co0.6Zn0.4Fe1.7Mn0.3O4) composites

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Krishnamayee Bhoi ◽  
H. S. Mohanty ◽  
Ravikant ◽  
Md. F. Abdullah ◽  
Dhiren K. Pradhan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Room Temperature ◽  
Single Phase ◽  
Microstructural Analysis ◽  
Magnetic Ordering ◽  
Particulate Composite ◽  
Capacitance Measurement ◽  
Magnetic Field Sensors ◽  
Spintronic Devices ◽  
Electric Coupling

AbstractMultiferroic composites are promising candidates for magnetic field sensors, next-generation low power memory and spintronic devices, as they exhibit much higher magnetoelectric (ME) coupling and coupled ordering parameters compared to the single-phase multiferroics. Hence, the 3-0 type particulate multiferroic composites having general formula (1 − Φ)[PbFe0.5Nb0.5O3]-Φ[Co0.6Zn0.4Fe1.7Mn0.3O4] (Φ = 0.0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 1.0, (1 − Φ) PFN-ΦCZFMO) were prepared using a hybrid synthesis technique. Preliminary structural and microstructural analysis were carried out using XRD and FESEM techniques, which suggest the formation of 3-0 type particulate composite without the presence of any impurity phases. The multiferroic behaviour of the composites is studied with polarization versus electric field (P-E) and magnetization versus magnetic field (M-H) characteristics at room temperature. The nature of ME coupling was investigated elaborately by employing the Landau free energy equation along with the magneto-capacitance measurement. This investigation suggests the existence of biquadratic nature of ME coupling (P2M2). The magneto-electric coupling measurement also suggests that strain mediated domain coupling between the ferroelectric and magnetic ordering is responsible for the magneto-electric behaviour. The obtained value of direct ME coefficient 26.78 mV/cm-Oe for Φ = 0.3, found to be higher than the well-known single-phase materials and polycrystalline composites.

scholarly journals Possibile Applications of Magnetic Microwires in Aviation

2014 ◽  
Vol 2013 (5) ◽  
pp. 12-17
Author(s):  
Katarína Draganová ◽  
Josef Blažek ◽  
Dušan Praslička ◽  
František Kmec
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Tensile Stress ◽  
Temperature Sensors ◽  
Sensing Element ◽  
Magnetic Field Sensors ◽  
Magnetic Microwires ◽  
Stress Sensors ◽  
Wide Range ◽  
Potential Applications

Abstract Magnetic microwires have been rediscovered due to a number of the unusual magnetic properties and their potential applications. The paper concerns glass-coated magnetic microwires composed of a ferromagnetic metallic core with a diameter of 0.6 - 30 jj.m and of a glass coat with a thickness of 2 - 20 jj.m. The fabrication process and magnetic properties of these microwires are described. Due to their unique properties microwires can be used as a sensing element of sensors. Microwire-based sensors can be used in a wide range of aviation applications as magnetic field sensors, tensile stress sensors or temperature sensors. The main advantages of microwire-based sensors are associated with their small dimensions and weight, which play a very important role in aviation.

Effect of Pulsed Magnetic Field Treatment on the Magnetic Properties of the Fe-Nd-Al-B Alloys Prepared by Suction Casting

2011 ◽  
Vol 688 ◽  
pp. 383-388 ◽  
Author(s):  
Qin Bai ◽  
H. Man ◽  
Y.J. Tang ◽  
H. Xu ◽  
S. Xia
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Curie Temperature ◽  
Curie Point ◽  
Amorphous Alloys ◽  
Exchange Coupling ◽  
Pulsed Magnetic Field ◽  
Magnetic Phases ◽  
Bulk Amorphous Alloys ◽  
Magnetic Field Treatment

The magnetic properties of the (Fe0.53Nd0.37Al0.10)96B4bulk amorphous alloys annealed in the temperature range of 293-623K for 30 min with and without an external pulsed magnetic field of 5T were studied. The results reveal that the remanence and coercivity of the samples are obviously improved with a pulsed magnetic field when annealed below the Curie temperature of the alloy. The increment of remanence reaches 25.9% for the sample annealed at 523K with a pulsed magnetic field, because of the enhancement of exchange coupling roles between the soft and hard magnetic phases. It provides a new way to improve the magnetic properties of the bulk amorphous alloys produced by pulsed magnetic annealing at temperatures below the Curie point of the alloys.

Investigation of the Structure and Magnetic Properties of Bulk Amorphous FeCoYB Alloy

2017 ◽  
Vol 68 (9) ◽  
pp. 2162-2165 ◽  
Author(s):  
Katarzyna Bloch ◽  
Mihail Aurel Titu ◽  
Andrei Victor Sandu
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Hyperfine Field ◽  
Irreversible Processes ◽  
Magnetization Process ◽  
Casting Method ◽  
The Core ◽  
Injection Casting ◽  
Core Losses ◽  
Microstructural Studies

The paper presents the results of structural and microstructural studies for the bulk Fe65Co10Y5B20 and Fe63Co10Y7B20 alloys. All the rods obtained by the injection casting method were fully amorphous. It was found on the basis of analysis of distribution of hyperfine field induction that the samples of Fe65Co10Y5B20 alloy are characterised with greater atomic packing density. Addition of Y to the bulk amorphous Fe65Co10Y5B20 alloy leads to the decrease of the average induction of hyperfine field value. In a strong magnetic field (i.e. greater than 0.4HC), during the magnetization process of the alloys, where irreversible processes take place, the core losses associated with magnetization and de-magnetization were investigated.

Computational Modeling of Optical Fiber-Based Magnetic Field Sensors Using the Faraday and Kerr Magnetooptic Effects

2020 ◽  
Vol 56 (9) ◽  
pp. 1-9
Author(s):  
Allamys Allan Dias da Silva ◽  
Henrique Patriota Alves ◽  
Felipe Camargo Marcolino ◽  
Jehan Fonseca do Nascimento ◽  
Joaquim Ferreira Martins-Filho
Keyword(s):  
Magnetic Field ◽  
Optical Fiber ◽  
Computational Modeling ◽  
Magnetic Field Sensors

Radiation-resistant magnetic field sensors based on SiO2(Ni)/Si structures

2019 ◽  
Vol 460 ◽  
pp. 209-211 ◽  
Author(s):  
E. Kaniukov ◽  
V. Bundyukova ◽  
D. Yakimchuk ◽  
A. Shumskaya ◽  
Yu. Bogatyrev ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Field Sensors ◽  
Radiation Resistant

scholarly journals Sensitivity of PS/CoPd Janus particles to an external magnetic field

RSC Advances ◽  
2021 ◽  
Vol 11 (28) ◽  
pp. 17051-17057
Author(s):  
Anna Eichler-Volf ◽  
Yara Alsaadawi ◽  
Fernando Vazquez Luna ◽  
Qaiser Ali Khan ◽  
Simon Stierle ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
Janus Particles ◽  
Weak Magnetic Fields

PS/CoPd Janus particles respond very sensitively to application of low external magnetic fields. Owing to the magnetic properties, the PS/CoPd particles may be used, for example, to sense the presence of weak magnetic fields as micro-magnetometers.

Sign in / Sign up

Export Citation Format

Share Document