Questions tagged [magnetism]

For questions about determining the paramagnetism, diamagnetism, etc. of chemical species and other chemical applications of magnetism. Note that questions oriented towards physical aspects of electromagnetism are off-topic on this site.

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39 views

T1 spin-lattice relaxation times, deviation from exponential relationship

For longitudinal relaxation, one would think that the magnetic moment obeys this simple relationship $$M_z = M_0\left[1 - 2\exp\left(\frac{-t}{T_1}\right)\right].$$ However there is always a point ...
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Properties of organic magnets

Recently, low-temperature, purely organic (i.e. without any transition metals involved) magnets have been synthesised. After reading related articles, my initial guess was that the molecules in ...
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Do magnetic fields generated from ion flow through a membrane channel have any physiological relevance?

Membrane pores and transporters see millions of ions flow through them per second. This creates a current and therefore a magnetic field. Do cells have any use for these fields (like maybe drawing ...
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Is there any reasonably inert magnetic oxide?

I spent yesterday evening looking for data on magnetic oxides. What is easily available isn't well organized, so I ask here in hope someone can remember. I'm looking for a magnetic oxide (that is, an ...
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698 views

Why does concentration of solutions of alkali metals in liquid ammonia change the magnetic properties?

In "NCERT Chemistry for Class XI - Volume II", in chapter "s-block elements", under the topic "Chemical Properties of alkali metals", it is given: (vi) Solutions in liquid ammonia: The alkali ...
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Electron Spin, and the Stern-Gerlach Experiment

I think I understand the basics of the electron spin. However, I'm trying to figure out how to tell if, when shooting a beam of atoms (the Stern-Gerlach experiment), how to tell if an element will ...
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1answer
516 views

Magnetic mercury

Well, since I'm not sure, quite simply: Is there a possible way (apart from running a current through in the presence of a perpendicular $\mathbf{B}$ field) to make a small mixture of mercury magnetic ...
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389 views

How do I solve such questions on paramagnetism and ferromagnetism?

Match the type of magnetism given in Group I with the material given in Group II: $$ \begin{array}{ll|ll} \hline & \textbf{Group I} & & \textbf{Group II} \\ \hline \text{P} & \...
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57 views

Why would ferrofluid harden?

I recently decided to make my own ferrofluid toy to play with. I built a sealed enclosure at my local fablab, and the end result was perfect. It worked just like in the videos you see online, and I ...
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51 views

Why isn't aluminum ferromagnetic?

I know that the ferromagnetism of iron is because of its unpaired d electrons, but I also know that there are other metals with unpaired electrons like aluminum that are not ferromagnetic. Is the ...
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239 views

Magnetic properties of potassium dichromate

Is $\ce{K_2Cr_2O_7}$ diamagnetic or paramagnetic? While näive theory predicts it's diamagnetic, but we can't be sure. I cannot find any literature on this topic. Nor does Wiki has that information. ...
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Paramagnetism of group 2 elements

As far as I know, paramagnetism in normal substance arises due to unpaired electrons. I believe that the valence electrons of group 2 elements (Be, Mg, Ca, Sr, Ba) are paired. But, here in the list ...
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How do hard drives store information using magnetic layering? (Antiferromagnetic/ferromagnetic films)

I am doing some work with solid state materials in some chemistry courses and I've been doing some research into exactly how a hard drive stores information as 1's and 0's. It seems like a bunch of ...
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220 views

Table for magnetic moments for all elements in periodic table? [closed]

I'm trying to look for a table for magnetic moments for all elements of the periodic table for my research project in computational chemistry, can anyone direct me to a suitable one?
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316 views

Is [Co(NH₃)₄Cl₂]Cl paramagnetic or diamagnetic?

$\ce{NH3}$ is known to be a strong field ligand, while $\ce{Cl}$ is known to be a weak field ligand. Is $\ce{[Co(NH3)4Cl2]Cl}$ a high spin complex or a low spin complex? I assumed this to be a high ...
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491 views

Only d orbital electrons for spin only magnetic moment

During my chemistry lessons and self studies, I have come upon many instances where I observed that during calculations of spin only magnetic moment of transition elements only the d orbital electrons ...
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948 views

Is cobalt (III) hexaaqua paramagnetic or diamagnetic?

The complex ion $\ce{[Co(H2O)6]^3+}$ has $\ce{Co}$ in the $+3$ oxidation state, meaning it has an electron configuration of $[Ar] 4s^0 3d^6$. Therefore it has 4 unpaired electrons and would be ...
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62 views

Is Neodymium Powder Magnetic?

In attempting to make magnetized neodymium (NdFeB) powder, I grinded neodymium magnets into a powderusing a belt sander. However, I found that the magnetic properties of the neodymium had decreased ...
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Other than ultracold lithium gas, are any ferromagnetic or magnetic gasses known or hypothesized?

I'm dealing with an interactive work of fiction right now, and one proposal is to combine two types of puzzles with a magnetic gas. I know that fermionic $\ce{^6Li}$, when cooled below $\pu{1 K}$, has ...
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596 views

Is Al2O3 (aluminum oxide) diamagnetic or paramagnetic?

The title about covers it, I am an amateur and I have found that checking 'molecule orbitals' can reveal the answer here but I cannot locate such an orbital. The reason for this question is I am ...
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1answer
50 views

Maximum metal-metal distance for antiferromagnetic coupling

Imagine a transition metal complex with multiple open-shell transition metal cations. If the metals are relatively close in distance, it is possible that antiferromagnetic coupling will occur between ...
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239 views

What is the magnetic moment of potassium hexacyanochromate(II)?

I calculated the magnetic moment of $\ce{K4[Cr(CN)6]}$? in the following way: $\ce{Cr^{+2}}$ has $4$ d electrons. And since $\ce{CN-}$ is a strong field ligand, the electrons will pair up in the $\...
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Help understanding the equation for Spin Energy in Zero Field

I’m working with a system that experiences spin frustration and for me this is the first time dealing with such a phenomenon. To grasp the concept, I’ve decided to go to the basics and read the ...
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1answer
60 views

Magnetic couplings using DFT in a spin frustrated system

I’m working with a trimeric copper system that have the classic triangular shape and experiences spin frustration. This is my first time dealing with such system and, so far, from what I’m reading, I ...
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Help understanding external magnetic field sensitivity of radical pair reaction rate

Two recent papers have been published on magnetoreception in birds. In this case it is the ability of the birds to sense the direction of the Earth's magnetic field potentially for navigation. ...
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320 views

Jahn Teller distortion and magnetic moments.

It is relatively well known that the discrepancy between the observed and experimental magnetic moments in the first row transition metals is attributed to spin-orbit coupling when it comes to metal ...
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781 views

Is Co[Hg(SCN)4] diamagnetic?

I was reading a book and it was mentioned that $\ce{Co[Hg(SCN)4]}$ is diamagnetic. I know that it is made up of $\ce{Hg^2+}$ and $\ce{Co^2+}$. $\ce{Co^2+}$ has 7 electrons which means that it should ...
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198 views

Coordination compounds

Which of the following complex is diamagnetic? $\ce{[Cr(Cl3)(NMe3)]}$ $\ce{[Co(EDTA)]-}$ $\ce{[Cu(CN)(NO2)(NH3)(Py)]}$ $\ce{[Fe(NH3)6]^2+}$ For (4) I found that since $\ce{NH3}$ ...
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Van der Waals interaction and magnetic dipole dipole interaction

I have a conceptual question that bothers me. From what I understand, van der Waals forces are the primary source of inter-molecular interaction. There are three different possible origins for van ...
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Why is neodymium the most paramagnetic lanthanide?

My textbook says that paramagnetism rises to a maximum in neodymium. I don't understand how gadolinium has 8 unpaired electrons, whereas neodymium has only 4. Shouldn't paramagnetism be higher in ...
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Is [PdCl2(PMe3)2] diamagnetic or paramagnetic?

Please tell me where I am wrong. The complex will have $\ce{Pd^{2+}}$ ion, which has a $\mathrm{d^8}$ configuration. So, it will have $2$ unpaired electrons. Unpaired electrons will mean that it is ...
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detecting/tracking nano particle [closed]

I am new to nano-sized particles and conducting a very simple experiment using nano particles. In my experiment I have nanomagnetic particles inside water and they are moving due to applied magnetic ...
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600 views

Magnetic work and the first law of thermodynamics

We commonly encounter the first law of thermodynamics in the form $\mathrm{d}E = T\mathrm{d}S - p\mathrm{d}V + \mu\mathrm{d}N$, which notes the contribution of thermal, pressure-volume, and chemical ...
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Why is the copper in my pan magnetic?

My Momma bought a copper pan made for induction because it was the only one she could find that she wanted and was big enough to pan fry half a chicken. But I noticed something odd about the copper. ...
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Unpaired electrons from magnetic moment

A complex formulated as $\ce{Cs_x[NbCl6]}$ has spin-only magnetic moment $\mu_{s.o}$ of approximately 2 B.M. From this value calculate how many unpaired electrons are present. Spin-only magnetic ...
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Why does some compound as given in the image below change from low spin to high spin above a particular transition temperature?

Magnetic moment sudden increase at a particular temperature is explained by CFT. But why does it happen at all?
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Amine Inversion and Paramagnetism

In amine inversion, there is a planar $sp^2$ intermediate. The electron pair transferred from the blue lobe to the red one during the inversion. It is natural to assume, for a layman like me, that ...
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217 views

Magnetic anisotropy of triple bonds

Is the rule for shielding/deshielding areas in NMR bond dependent? The acetylene C triple bond C has deshielding zone perpendicular to the triple bond. Will the same deshielding zone hold true for C ...
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What atom is always paramagnetic and why?

Regardless of its electron configuration, it must always be paramagnetic when it's a single, neutrally charged atom: (A) Carbon (B) Nitrogen (C) Oxygen (D) Neon (E) Argon At first, I eliminated D ...
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Magnetic Water Softener

I've been asked to install some kind of technology to a building with 40 rooms to soften the water. Browsing through the product catalog I found this so called "Magnetic Water Softener", however ...
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Why is gadolinium specifically used in MRI contrast agents?

Gadolinium(III) chelate complexes are routinely used as contrast agents in magnetic resonance imaging (MRI);1 the usual explanation is that paramagnetic species contain unpaired electrons, which cause ...
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Single-molecule magnet with electrically-controlled permeability: How does the Titan Shield from Deus Ex work?

In a recent installment of Deus Ex game series there is an augmentation called "Titan Shield" (it has nothing to do with $\ce{Ti}$ element): A neodymium skin underlay matrix built of nano-meshed ...
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1answer
729 views

Magnetic and acidic properties of nitric oxide

I was faced with the following question: PART C – CHEMISTRY Which one of the following properties is not shown by $\ce{NO}$? It combines with oxygen to form nitrogen dioxide Its bond ...
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What is behind of the attraction between a burned matchstick with a magnet?

I do not know how to understand the reasons of why a burned matchstick is attracted by a magnet (most probably) of Neodymium. Here are some screenshots of a video in which this natural phenomenon is ...
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“Alternative” derivation of the spin-only formula

The spin-only formula $$\mu_\mathrm{so} = \mu_\mathrm{B} \sqrt{n(n+2)} = \mu_\mathrm{B}\cdot 2\sqrt{S(S+1)}$$ is usually a good first approximation to calculate the magnetic moment of transition ...
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Reactivity of magnetized materials

Does the magnetisation process affects the reactivity of a magnetic material? Does the electronegativity change if a metal is magnetised?
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How does magentic field change spin values of a proton or electron? [closed]

I am asking this in context of NMR. Firstly I wanna say that I thought that spin values of a proton or electrons were intrinsic. I didn't know that you can change spin states from one value to another....
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142 views

Chemical reaction and shift in magnetic susceptibility sign

I'm trying to find an easy experiment involving a chemical reaction in which two paramagnetic reactants A and B react to give a product which is diamagnetic (or the reverse). The idea is to show that ...
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Is ZnO still diamagnetic after you dope it with aluminium?

There are no unpaired electrons in $\ce{ZnO}$, making $\ce{ZnO}$ diamagnetic. Aluminium has an unpaired electron, which would mean it is paramagnetic. Will $\ce{ZnO}$ become paramagnetic after it ...
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Why doesn't curie temperature follow a periodic trend in ferromagnetic materials

I was writing up an answer to a question which was asking why the Curie Temperature's of $\ce{Fe, Co, Ni}$ don't follow a periodic trend. The OP voluntarily deleted his question before I could finish ...