Search found 21 matches

by christiansen
Wed Apr 17, 2024 2:30 pm
Forum: General forum
Topic: Assistance Required in Defining Spin for a Metal Radical System in Easyspin
Replies: 3
Views: 207

Re: Assistance Required in Defining Spin for a Metal Radical System in Easyspin

You system has two spin entities, a s=2 and an s=1/2, but Sys.nucs and Sys.A has three entries. That does not match - only one nucleus can be associated with each spin centre.

by christiansen
Sat Apr 13, 2024 4:00 am
Forum: General forum
Topic: Optimising simulations to match data from non-standard setups
Replies: 1
Views: 168

Optimising simulations to match data from non-standard setups

Dear Easyspin Community I have, with limited success, been trying to optimise the match between simulations and data measured on a home-built HF EPR setup. My data is measured with frequencies between 128 and 660 GHz. My collaborators told me that the the instrument was setup in a "double-pass&...
by christiansen
Fri Apr 12, 2024 2:51 am
Forum: General forum
Topic: Assistance Required in Defining Spin for a Metal Radical System in Easyspin
Replies: 3
Views: 207

Re: Assistance Required in Defining Spin for a Metal Radical System in Easyspin

If each ligand has one electron delocalised across its pi system, you simply model by a single s=1/2. So one s = 3/2 and three s=1/2 in total.

by christiansen
Fri Mar 15, 2024 6:50 am
Forum: General forum
Topic: Spatial dependence of dipolar interaction?
Replies: 2
Views: 242

Spatial dependence of dipolar interaction?

Dear Easyspin community I wonder, how is the spatial dependence of the dipolar interaction implemented in Easyspin? Usually, the dipolar energy between two magnetic moments is defined by their dot product as well as their projections along the vector that separates them. For example, consider four s...
by christiansen
Sun Jan 28, 2024 3:23 am
Forum: General forum
Topic: User-defined Hamiltonian algorithm for "curry"
Replies: 1
Views: 837

User-defined Hamiltonian algorithm for "curry"

Dear Easyspin community Is there any way to use a user-defined Hamiltonian to compute magnetic data of a spin system using "curry"? I have written an algorithm to add another interaction to the matrix generated by "ham" and I would like to compute the magnetism of the resulting s...
by christiansen
Wed Nov 22, 2023 9:05 am
Forum: General forum
Topic: Seeking suggestions to fit EPR spectrum of a Fe(III) complex having both high-spin and low-spin components
Replies: 3
Views: 4052

Re: Seeking suggestions to fit EPR spectrum of a Fe(III) complex having both high-spin and low-spin components

What I mean is that Easyspin clearly adds a significant baseline correction to the fitted spectrum. The curvature of the green line at the largest B-fields is from the baseline, not from the spectrum. I think the baseline added to the calculated spectrum may distort the relative intensities of the c...
by christiansen
Tue Nov 21, 2023 7:30 am
Forum: General forum
Topic: Seeking suggestions to fit EPR spectrum of a Fe(III) complex having both high-spin and low-spin components
Replies: 3
Views: 4052

Re: Seeking suggestions to fit EPR spectrum of a Fe(III) complex having both high-spin and low-spin components

It looks like your fit has at a quite hefty baseline correction. Does the problem persist without baseline, or if the baseline is restricted to a constant?

by christiansen
Fri Nov 03, 2023 2:04 am
Forum: General forum
Topic: Different Line Width for Different Transitions?
Replies: 6
Views: 7388

Re: Different Line Width for Different Transitions?

Thank you once again! I was not aware these features were built into Easyspin. I even found 'convspec' which produces the line shape and does the convolution all in one line.

by christiansen
Thu Nov 02, 2023 11:33 am
Forum: General forum
Topic: Different Line Width for Different Transitions?
Replies: 6
Views: 7388

Re: Different Line Width for Different Transitions?

Follow-up question: I use Matlab's "normpdf" to generate a gaussian array for the convolution and "conv" with the kwarg "same" to perform the convolution. However, I find that the resulting spectra depend on my x-array spacing in the pdf array. Am I doing something wron...