Intelligent Materials and Systems Lab - User contributions [en]

User:Veske

2018-09-26T08:12:27Z

Veske: Add link to BSc thesis

==Mihkel Veske==
[[Image:MihkelVeske.jpg|200px]]

E-mail: veske[att]ut.ee, mihkel.veske[att]helsinki.fi

Skype: kallurauto

GSM: +372 53422873

[https://www.etis.ee/portal/portaal/isikuCV.aspx?TextBoxName=Mihkel+Veske&PersonVID=70427&FromUrl0=isikud.aspx&lang=en CV from Estonian Research Portal]

[[Media:B2011_Veske.pdf|BSc thesis]]

[[Mihkel's MSc|MSc thesis]]

[[Secure:Mihkel's PhD|Mihkel's PhD]]

File:B2011 Veske.pdf

2018-09-26T08:03:19Z

Veske: User created page with UploadWizard

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|date=2011-05-25
|source={{own}}
|author=[[User:Veske|Veske]]
|permission=
|other versions=
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=={{int:license-header}}==
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File:Mms format.xml

2016-01-14T16:22:04Z

Veske:

User:Veske

2015-09-21T12:44:22Z

Veske: /* Mihkel Veske */

==Mihkel Veske==
[[Image:MihkelVeske.jpg|200px]]

E-mail: veske[att]ut.ee, mihkel.veske[att]helsinki.fi

Skype: kallurauto

GSM: +372 53422873

[https://www.etis.ee/portal/portaal/isikuCV.aspx?TextBoxName=Mihkel+Veske&PersonVID=70427&FromUrl0=isikud.aspx&lang=en CV from Estonian Research Portal]

[[Mihkel's MSc|MSc thesis]]

[[Secure:Mihkel's PhD|Mihkel's PhD]]

File:Tcr vs d vs E stopE elmig10.png

2015-09-07T13:36:00Z

Veske:

File:Tcr vs d and E mp h60.png

2015-09-07T13:14:07Z

Veske:

User:Veske

2015-08-25T09:45:41Z

Veske: /* Mihkel Veske */

==Mihkel Veske==
[[Image:MihkelVeske.jpg|200px]]

E-mail: veske[ätt]ut.ee, mihkel.veske[ätt]helsinki.fi

Skype: kallurauto

GSM: +372 53422873

[[Mihkel's MSc|MSc thesis]]

[[Secure:Mihkel's PhD|Mihkel's PhD]]

Mihkel's MSc

2015-05-21T13:46:46Z

Veske: Created page with "===[http://hdl.handle.net/10062/30777 Local structure and dynamics in spin-Peierls compound TiPO4 : a 31P NMR study]=== Quasi one dimensional conductors..."

===[http://hdl.handle.net/10062/30777 Local structure and dynamics in spin-Peierls compound TiPO4 : a 31P NMR study]===

Quasi one dimensional conductors and spin chains are popular subjects of study both in theoretical and experimental physics. Because of sophisticated magnetic field – temperature phase diagrams and unique quantum effects taking place they regained the attention of many researchers. One of those phenomenons is spin-Peierls (SP) effect in low dimensional magnetic structures. In spin-Peierls state the ground state of magnetic structure isn’t ordered ferromagnetic or antiferromagnetic, but diamagnetic singlet state, which is usually accompanied by dimerization of linear magnetic chain.

The first compounds where SP effect was found were TTF-CuBDT ane TTF-AuBDT, where in linear antiferromagnetically interacting S = 1/2 chains the transition into singlet state were observed on temperatures TSP_Cu = 12K, TSP_Au = 2K, respectively. The first anorganic SP compound was discovered in 1993, when it was found, that in magnetic fields H > 12.5T the diamagnetic dimerized SP state chain in CuGeO3 transformed in temperature TSP = 14.7K into incommensurate SP state. In titanium compounds the SP transition takes place in remarkably higher temperatures than 14.7K – in TiOCl the transition occurs in TSP = 92K/65K, in TiOBr TSP = 48K/27K, in TiPO4 TSP = 112K/73K. It is important to notice, that the SP transition in all the mentioned Ti compounds takes place in two steps – reducing the temperature causes firstly the transition from paramagnetic state into incommensurate SP phase, which in lower temperatures is followed by transition into commensurate SP state.

In the master’s thesis it was investigated the structural changes of TiPO4 when going from paramagnetic phase into dimerized spin-Peierls state, using nuclear magnetic resonance techniques
on phosphorus isotope 31P. Earlier Glaum et al. X-ray structural analysis studies didn’t see any noticeable changes in TiPO4 structure, which gave the motivation to determine the chemical shift tensor of 31P and the orientation of its main axes with respect to crystal lattice. Knowing the tensors and their orientations enables to investigate the structural changes on a lot more precise level.

A byproduct of master’s thesis was the approximate energetic gap width in spin excitation spectrum,
which was found from the temperature dependence of 31P spin-lattice relaxation.

User:Veske

2015-05-21T13:46:32Z

Veske: /* Mihkel Veske */

==Mihkel Veske==
[[Image:MihkelVeske.jpg|200px]]

E-mail: veske[ätt]ut.ee

Skype: kallurauto

GSM: +372 53422873

[[Mihkel's MSc|MSc thesis]]

[[Secure:Mihkel's PhD|Mihkel's PhD]]

File:Tcr ramp hold liang.png

2015-04-10T14:39:46Z

Veske:

User:Veske

2015-02-16T18:15:44Z

Veske: /* Mihkel Veske */

==Mihkel Veske==
[[Image:MihkelVeske.jpg|200px]]

E-mail: veske[ätt]ut.ee

Skype: kallurauto

GSM: +372 53422873

[[Secure:Mihkel's MSc|MSc thesis]]

[[Secure:Mihkel's PhD|Mihkel's PhD]]

User:Veske

2015-02-16T17:59:20Z

Veske: /* Mihkel Veske */

==Mihkel Veske==
[[Image:MihkelVeske.jpg|200px]]

E-mail: veske[ätt]ut.ee

Skype: kallurauto

GSM: +372 53422873

[[Secure:Mihkel's MSc|Mihkel's MSc]]

[[Secure:Mihkel's PhD|Mihkel's PhD]]

User:Veske

2015-02-16T17:59:12Z

Veske: /* Mihkel Veske */

==Mihkel Veske==
[[Image:MihkelVeske.jpg|200px]]

E-mail: veske[ätt]ut.ee

Skype: kallurauto

GSM: +372 53422873

[[Secure:Mihkel's MSc|Mihkel's MSc]]
[[Secure:Mihkel's PhD|Mihkel's PhD]]

File:Wtc o100 r12 h90.gif

2015-02-16T17:57:38Z

Veske:

File:Wtc o111 r8 h90.gif

2015-02-16T17:47:21Z

Veske:

File:Wtc o110 r8 h90.gif

2015-02-16T17:47:04Z

Veske:

File:Wtc o100 r8 h90.gif

2015-02-16T17:46:39Z

Veske:

File:Wtc r10 e02.gif

2015-02-13T13:30:09Z

Veske:

File:Wtc r10 e01.gif

2015-02-13T13:29:52Z

Veske: Veske uploaded a new version of "File:Wtc r10 e01.gif"

File:Wtc r10 e01.gif

2015-02-13T13:29:48Z

Veske:

File:Wtc r10 e00.gif

2015-02-13T13:29:37Z

Veske:

File:Wtc r08 e02.gif

2015-02-13T13:29:23Z

Veske:

File:Wtc r08 e01.gif

2015-02-13T13:29:10Z

Veske:

File:Wtc r08 e00.gif

2015-02-13T13:28:58Z

Veske: