mining Coercive force

Coercivity of Magnets | SpringerLink

Coercivity may be called coercive field or coercive force. In principle, coercivity corresponds to the end of metastability, that is, the spinodal point (precisely speaking, the dynamical spinodal point discussed in Sect. 3.6 ) of materials, but it is affected by the dipole–dipole interaction and also by the fact that magnets consist of an ...

Temperature properties of the alignment dependence of coercive force …

1. Introduction. It is well known that the coercive force of NdFeB sintered magnet is very small compared with the anisotropy field of an Nd 2 Fe 14 B compound. Sintered SmCo 5 magnet and ferrite magnet, which are used in various applications, have similar properties to NdFeB sintered magnets. This discrepancy is referred to as …

A tool to predict coercivity in magnetic materials

The two distinguishing features of our coercivity tool are that: (a) we introduce a large localized disturbance, such as a spike-like magnetic domain, that …

Coerce Definition & Meaning

to compel to an act or choice; to achieve by force or threat; to restrain or dominate by force… See the full definition. Games & Quizzes; Games & Quizzes; Word of the Day; Grammar; Wordplay; Word Finder ... coercive-ˈər-siv. adjective. Legal Definition. coerce. transitive verb. co· erce kō-ˈərs . coerced; coercing

Text mining police narratives of domestic violence events to …

There were 852,162 behaviours extracted by the text-mining system across 526,787 domestic violence events, with 57% of these events having at least one coercive control behaviour detected and 8% with three or more distinct subcategories of coercive control behaviours. These events were associated with 223,645 unique persons of interest.

Control of Coercivity and Magnetic Anisotropy Through …

The present study aims to develop low magnetic anisotropy Ni-Zn nanoferrites with cobalt substitution. The results enable the development of nanoferrite samples with superior magnetic properties suitable for high-frequency core applications through an understanding of the influence of cobalt in the manipulation of the magnetic …

The coercieve force and the theory of ferromagnetic domain …

The results show that the coercive force is proportional, amongst other factors, to the ratio of the barrier width to the domain wall width and to the fractional …

Coercive forces Definition & Meaning

The meaning of COERCIVE FORCE is the opposing magnetic intensity that must be applied to a magnetized material to remove the residual magnetism.

Coercivity

Micromagnetic simulations have been employed in order to explain the underlying mechanism for a higher coercivity in poorly textured Nd-Fe-B permanent magnets. Fidler et al. reported that increase of alignment of modeled sample with different grain sizes of 5 μm and 50 nm leads to an increase of the coercive force (Fidler and Schrefl, 1996 ...

The Ultimate Understanding Of Magnetic Coercivity

Magnetic coercivity is a measure of the resistance of a material to becoming demagnetized when exposed to an external magnetic field. It is the amount of magnetic field strength required to reduce the …

Driving forces of sustainability in the mining …

Coercive and the normative pressures have the potency to drive all the triple bottom line of sustainability. Mimetic institutional pressures also influence …

Coercivity of Magnets | SpringerLink

Coercivity is the amplitude of the magnetic field until which the magnetization persists in an antiparallel magnetic field. Coercivity may be called coercive field or …

Understanding Coercivity

Coercivity is also known as coercive force. Since the coercive force is much lower for soft magnetic materials, it makes sense to use them for applications where the polarity will be reversed often. The lower …

Text mining police narratives of domestic violence events to …

By Min-Taec Kim and George Karystianis (UNSW) AIM To construct a measure of coercive control behaviours from free-text narratives recorded by the NSW Police Force for each domestic violence event, and to assess how useful this measure might be in detecting coercive control behaviours when combined with existing …

Measuring low coercive force using a vibrating sample …

The coercive force Hc of commercially pure iron and an 80% NiFe alloy were measured on toroid samples using a hysteresigraph and on nontoroid samples of the same materials using a vibrating sample magnetometer. Within experimental error, the results were equal for each case. Values of Hc appeared to be insensitive to specimen shape. It appears …

Temperature properties of the alignment dependence of coercive force …

The coercive force is determined when magnetization (J) is canceled by the reverse magnetization [7]. The magnetization at the coercive force is expressed by the following equation: J = 1 2 Js (∫ θ 1 π 2 P (θ) sin 2 θ d θ − ∫ 0 θ 1 P (θ) sin 2 θ d θ) = 0. In Eq. (3), Js is the saturation magnetization of NdFeB sintered magnet.

Text mining police narratives of domestic violence …

This study used a text mining method to identify coercive control related behaviours from the free-text descriptions in police narratives of 526,787 domestic violence related events occurring between 1 January 2009 and 21 March 2020. This allowed us to measure the prevalence of 48 separate behaviours which we grouped into six categories.

Research on La3+–Co2+-substituted strontium ferrite magnets for …

Fig. 4, Fig. 5 show the effect of La 3+ –Co 2+ substitution on residual flux density (B r) and intrinsic coercive force (H cj) of sintered Sr ferrite magnets at different temperatures.It is well shown that La 3+ –Co 2+ substitution apparently increases intrinsic coercive force (H cj) from 301.2 kA/m at x=0 to the maximum value of 401.5 kA/m at …

Coercive, normative and mimetic isomorphism as …

The aim of the first stage is to develop the indices from the first logit model estimation that use coercive force (the "Legal" variable), normative force (the "Culture" variable) and mimetic force (the "Industry_Pressure" variable) as instruments to determine the predicted values of assurance based on the coercive aspect alone in ...

Text mining domestic violence police narratives to …

Methods We modied an existing rule ‑based text mining method to identify 48 coercive control related behav‑ iours from 406,196 DFV reports involving a single person of interest (POI) (i.e., an individual suspected or charged with a DFV oence) against a single victim from NSW Police Force records between 2009 and 2020.

Coercive Force and Strength of Carbon Steel

mining σ u from Eq. (8) ( ), we may recom-mend the use of Eq. (8) in the nondestructive assess-ment of σ u for carbon steel components on the basis of H c data. For example, the coercive force H c of cold-worked carbon steel 20 is 624 ± 40 A/m, according to [7, Table 3]. The range of σ u for this steel is estimated at 736–834 N/mm2 ...

Magnetic Coercivity | Electricity

Magnetic coercivity, also known as coercive force or coercive field, is a crucial property of magnetic materials that determines their ability to retain magnetization under the …

Ending Exploitation in the DRC's Deadly Cobalt Mines

June 6, 2023. Whether you know it or not, much of your life is powered by Congolese cobalt—and by the people who mine it. There's a little piece of cobalt in nearly every smartphone, tablet, and laptop. That makes cobalt indispensable to global tech and manufacturing companies. But cobalt extraction is a major driver of human rights abuses.

Coercive Force and Strength of Carbon Steel

mining σ u from Eq. (8) ( ), we may recom-mend the use of Eq. (8) in the nondestructive assess-ment of σ u for carbon steel components on the basis of H c data. …

COERCE definition and meaning | Collins English Dictionary

To compel or restrain by force or authority without regard to individual wishes or desires.... Click for English pronunciations, examples sentences, video.

Extended theory of the coercive force due to domain wall …

In particular, we obtain results for the coercive force due to such pinning as a function of two dimensionless constants characterizing the defect and of the defect width. We also obtain results for the maximum obtainable coercive force in terms of these parameters. We discuss these results in terms of applications to the Sm 2 ...

Invisible Blockades and Strategic Coercion

Regardless of how the mines might be laid, this is an option worthy of consideration whenever the U.S. military is asked to use coercive force to shape adversary policy. A Profound Success The Vietnam War was primarily a land war, but the Navy conducted a wide range of operations, including naval mining.

Damage evaluation for AISI 304 steel under cyclic loading based …

1. Introduction. The latest investigations in the field of the magnetic structurescopy allowed one to find the similarity between the magnetic and mechanical properties of some ferromagnetic structural steels [1], [2].Moreover, the experimental results showed the response of the coercive force to the mechanical loads [3], [4], [5].The …

Coercive field | physics | Britannica

Other articles where coercive field is discussed: magnetism: Remanence: …field strength known as the coercive force. Further increase in the reverse field H sets up a reverse field B that again quickly reaches a saturation value S′. Finally, as the reverse field is removed and a positive field applied, B traces out the lower broken line back to a…

Coercivity & retentivity (Permanent

About. Transcript. Ferromagnets with high retentivity and coercivity are used as permanent magnets (hard magnets), while the ones with low retentivity & coercivity (soft magnets) are …