- Historical highlights
- Achievements in ultra low temperature physics
From the beginning of 2015 the Low Temperature Laboratory of OVLL was introduced as a part of a new Department of Applied Physics and the Brain Research Unit of OVLL formed a new Department of Neuroscience and Biomedical Engineering with former Department of Biomedical Engineering and Computational Science.
Both of the infrastructures of the laboratory, Cryohall and Aalto NeuroImaging, were selected to the national research inrastructure strategy and roadmap 2014-2020.
Aalto NeuroImaging -infrastructure was established.
Low Temperature Lab was renamed as Olli V. Lounasmaa Laboratory (OVLL).
Riitta Hari appointed Academician of Science.
Professor Pertti Hakonen becomes the new director of the LTL.
National research infrastructure roadmap was presented for the first time. The Cryohall of the Low temperature laboratory was selected on to the roadmap and the neuroimaging infrastructure of the Brain research unit was recognized as important national infrastructure.
12 leading European low temperature laboratories formed a European Microkelvin Collaboration – MICROKELVIN, and received FP7-funding from the Capacities Specific Programme called Infrastructures. MICROKELVIN is coordinated by LTL.
Olli V. Lounasmaa's memoirs, titled “Täällä ei näperrellä! – Kylmäfyysikon kuumat paikat”, were published in January 2008 and included a detailed history of LTL.
The graduation of the laboratory’s 100th PhD student.
LTL moved to new premises (Puumiehenkuja 2B) at the end of 2007.
LTL became the home of two national Centers of Excellence (CoE), one in LowTemperature Quantum Phenomena and Devices and another one in Systems Neuroscience and Neuroimaging.
LTL established a memorial prize carrying the name of Academician Olli V. Lounasmaa. The first prize was awarded in 2004 to Professor John Clarke from University of California, Berkeley.
Olli Lounasmaa appointed Academician of Science.
Academy Professor Olli Lounasmaa retires Professor Mikko Paalanen becomes the new director of the LTL. Nanophysics introduced as a new research direction. LTL selected by IUPAP to host LT22 in 1999.
LTL is granted Center of Excellence status by the Academy of Finland. LTL is granted by the EU’s HCM program a European Large Scale Facility status in both ultra low temperature physics (ULTI) and Biomagnetism (BIRCH) for 1994-97.
Neuromagnetic brain research started.
LTL organizes LT15, the main international conference in low temperature physics.
LTL becomes an independent unit of TKK.
LTL founded as a low temperature physics laboratory by Professor Olli V. Lounasmaa.
Non-ground-state Bose-Einstein condensates of magnons in superfluid 3He-B are generated
Propagating vortex front is observed
An intrinsic velocity-independent criterion for superfluid turbulence is discovered
Kelvin-Helmholtz instability of the interface between two superfluids is discovered
Circulation of doubly quantized vortex measured
Simulation of early universe with the rapid superfluid phase transition in 3He
Landau's prediction of vortex sheet confirmed experimentally
Composite topological object - spin-mass vortex which terminates the soliton - is observed
Vortex core transition found in superfluid 3He-B
Vortices observed in superfluid 3He
Viscosity measurements confirm superfluidity in 3He
Superconductivity in Li
Nuclear ferromagnetism in Li
Influence of nuclear magnetism on superconductivity in Rh
World record temperature of 100 pK in a Rh sample
Neutron diffraction shows long range nuclear magnetic order in Ag
World record temperature of 280 pK in a Rh sample
Complex phase diagram mapped by neutron diffraction in Cu
Antiferromagnetic ordering in Ag at 560 pK
First Bragg reflection from antiferromagnetically ordered Cu
Antiferromagnetic ordering observed in Cu at 58 nK
Devil's staircase of facets observed on 4He crystals.
Thermodynamics of 4He solid was studied, no non-phonon contribution found
Quantum roughening of 3He crystals is observed and studied
10 new facets discovered on 3He crystal surface
3He crystals are imaged at temperatures below 1 mK
Facet growth by step motion detected and studied in detail
Facets on 4He crystals found to be curved
Optical detection of vortex-free meniscus in rotating superfluid 3He
Optical measurements in a rotating cryostat below 1 mK
Nanomechanical microwave amplifier
SQUIPT magnetic field sensor
Sluice Cooper pair pump
BOT current amplifier (Science 2003)
Carbon nanotube based SET
8 nm particles and nanotubes moved with the tip of an AFM. Superconductor-insulator transition characterized in a single isolated Josephson junction.
15 nm linewidth demonstrated in electron beam writing.
Single electron transistors demonstrated successfully.
Pulsetube based liquefaction started
Five dry dilution refrigerators are running in the laboratory and dry demagnetization refrigerator is under development (in cooperation with BlueFors Cryogenics)
Robust plastic dilution refrigerator was developed
BlueFors Cryogenics (LTL spin-off company) was established
First dry dilution refrigerator assembled in the laboratory
World's largest dilution refrigerator for cooling polarized targets completed at CERN
1.6 T magnet built for phosphorus NMR imaging
MRI system with a superconducting magnet built for clinical evaluation
Millikelvin temperatures in a rotating cryostat
100 kW superconducting motor built and successfully tested
Double nuclear cooling in operation
Cryostat combining nuclear cooling with dilution refrigeration operational