Search Results - "KNUUTTILA, T. A"

Observation of microwave-induced zero-conductance state in Corbino rings of a two-dimensional electron system by Yang, C L, Zudov, M A, Knuuttila, T A, Du, R R, Pfeiffer, L N, West, K W

“…Using Corbino samples we have observed oscillatory dc conductance in a high-mobility two-dimensional electron system when it is subjected to crossed microwave…”
Get full text

Effect of heat treatment of pure and carbon-polluted rhodium samples on the low-temperature resistivity by LEFMANN, K, KNUUTTILA, T. A, MARTIKAINEN, J. E, KUHN, L. T, NUMMILA, K. K

“…We present a systematic investigation of conditions for heat treatment of Rh with the aim of increasing the residual resistivity ratio (RRR). The maximal value…”
Get full text

High temperature expansion and exact diagonalization of the rhodium nuclear spin system compared to experimental results by JUNTUNEN, K. I, LEFMANN, K, KNUUTTILA, T. A, TUORINIEMI, J. T

“…The nuclear spin system of Rh metal has recently been investigated experimentally. No nuclear magnetic ordering was observed in these measurements, in spite of…”
Get full text

A versatile nuclear demagnetization cryostat for ultralow temperature research by YAO, W, KNUUTTILA, T. A, NUMMILA, K. K, MARTIKAINEN, J. E, OJA, A. S, LOUNASMAA, O. V

Get full text

Polarized nuclei in normal and superconducting rhodium by KNUUTTILA, T. A, TUORINIEMI, J. T, LEFMANN, K, JUNTUNEN, K. I, RASMUSSEN, F. B, NUMMILA, K. K

“…We performed SQUID-NMR measurements on a rhodium single crystal at ultra-low nuclear-spin temperatures. With initial polarizations up to p = 0.95, the…”
Get full text

Relaxation of polarized nuclei in superconducting rhodium by Knuuttila, TA, Tuoriniemi, JT, Lefmann, K

“…Nuclear spin lattice relaxation rates were measured in normal and superconducting (sc) rhodium with nuclear polarizations up to p = 0. 55. This was sufficient…”
Get full text

Nuclear cooling and spin properties of rhodium down to picokelvin temperatures by Tuoriniemi, J.T, Knuuttila, T.A

“…The lowest temperatures ever measured have been produced by cascade adiabatic nuclear demagnetization of copper and rhodium. Ultimately, spontaneous…”
Get full text

Double-spin-flip resonance of rhodium nuclei at positive and negative spin temperatures by Tuoriniemi, JT, Knuuttila, TA, Lefmann, K, Nummila, KK, Yao, W, Rasmussen, FB

“…Sensitive SQUID-NMR measurements were used to study the mutual interactions in the highly polarized nuclear-spin system of rhodium metal. The dipolar coupling…”
Get full text

Direct measurements of electron thermalization in Coulomb blockade nanothermometers at millikelvin temperatures by Knuuttila, T.A., Nummila, K.K., Yao, W., Kauppinen, J.P., Pekola, J.P.

“…We investigate electron thermalization of tunnel junction arrays installed in a powerful dilution refrigerator whose mixing chamber can produce lattice…”
Get full text

Nuclear cooling and spin properties of rhodium down to picoKelvin temperatures by Tuoriniemi, J T, Knuuttila, T A

“…The lowest temperatures ever measured have been produced by cascade adiabatic nuclear demagnetization of copper and rhodium. Ultimately, spontaneous…”
Get full text

Observation of Apparently Zero-Conductance States in Corbino Samples by Yang, C. L, Zudov, M. A, Knuuttila, T. A, Du, R. R, Pfeiffer, L. N, West, K. W

“…Phys. Rev. Lett. 91, 096803 (2003) Using Corbino samples we have observed oscillatory conductance in a high-mobility two-dimensional electron system subjected…”
Get full text

A new ultralow temperature cryostat in Helsinki by Yao, Weijun, Knuuttila, Tauno A., Martikainen, Juha E., Nummila, Kaj K., Lounasmaa, Olli V., Oja, Aarne S., Lefmann, Kim

Get full text