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Hi Jason,</div>
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I have deposited Ir on a variety of surfaces, and the process is actually quite straightforward. I simply connected an Ir wire to a high current feedthrough (connected to a UHV STM chamber) and passed the current through it to evaporate the metal. I calibrated
the deposition rate using Auger.</div>
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A common approach is to use a W wire and wrap the source material around it. However, that method can also result in some W being co-deposited along with Iridium.</div>
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For your reference, I've attached three of my papers that mention Ir deposition.</div>
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Please feel free to reach out if you have any questions or if there's anything else I can help with.</div>
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Best,</div>
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Nuri</div>
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<br>
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<span style="font-size: 12pt;">Professor Nuri Oncel, Ph.D.</span></p>
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<span style="font-size: 12pt; color: blue;"><a href="https://www.und.edu/Nanofoundry" style="color: blue; margin-top: 0px; margin-bottom: 0px;"><u>Director of UND-NanoFoundry</u></a></span></p>
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<span style="font-size: 12pt;">Department of Physics and Astrophysics</span></p>
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<span style="font-size: 12pt;">University of North Dakota</span></p>
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<span style="color: blue;"><a href="https://sites.google.com/view/oncel-research-group/group" style="color: blue; margin-top: 0px; margin-bottom: 0px;"><u>https://sites.google.com/view/oncel-research-group/group</u></a></span><span style="color: black;"> </span></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of EDWARDS, JASON R CTR USAF AFMC AFRL/RYDD <jason.edwards.30.ctr@us.af.mil><br>
<b>Sent:</b> Tuesday, August 4, 2026 8:09 AM<br>
<b>To:</b> labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> [labnetwork] Evaporating Iridium</font>
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<p class="x_MsoNormal"><span style="font-size:11.0pt">Good morning network,</span></p>
<p class="x_MsoNormal"><span style="font-size:11.0pt"> I am interested to see if any of you have experience using Iridium in your evaporation systems. We are getting conflicting information from various manufacturers on how we should go about melting
our Iridium. Our OEM recommends melting straight in the pocket while Lesker recommends using their Fabmate crucible liner. If you evaporate Iridium, do you use a liner in your system? In what form do you receive your Iridium? Pellets, shot, rods? For what
it is worth the Iridium that was purchased for us is flat fractured pieces ranging in size from dust to 8mm, which seems less than ideal.</span></p>
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<p class="x_MsoNormal"><span style="font-size:11.0pt">Thanks,</span></p>
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