After a month long absence, Pick of the Week returns with a look at a fantastic commentary article on spin-transfer torque magnetoresistive random access memory...
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Can we make a Star Trek phaser? In a classic example of life imitating art, the militaries of many countries are actively pursuing such directed energy weapons. So far, we’ve developed high-energy lasers and masers, particle beams, and something that looks a lot like an aimed lightning bolt. But our versions are huge, what must be overcome to make hand-held versions?... Read more »
Shao, L., Cline, D., Ding, X., Ho, Y., Kong, Q., Xu, J., Pogorelsky, I., Yakimenko, V., & Kusche, K. (2013) Simulation prediction and experiment setup of vacuum laser acceleration at Brookhaven National Lab-Accelerator Test Facility. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 25-29. DOI: 10.1016/j.nima.2012.09.053
Bartal, T., Foord, M., Bellei, C., Key, M., Flippo, K., Gaillard, S., Offermann, D., Patel, P., Jarrott, L., Higginson, D.... (2011) Focusing of short-pulse high-intensity laser-accelerated proton beams. Nature Physics, 8(2), 139-142. DOI: 10.1038/nphys2153
Peralta, E., Soong, K., England, R., Colby, E., Wu, Z., Montazeri, B., McGuinness, C., McNeur, J., Leedle, K., Walz, D.... (2013) Demonstration of electron acceleration in a laser-driven dielectric microstructure. Nature, 503(7474), 91-94. DOI: 10.1038/nature12664
R.D. Curry. (2012) Investigation of a toroidal air plasma under atmospheric conditions . Plasma Science (ICOPS), 2. DOI: 10.1109/PLASMA.2012.6383564
Transformer Hum Whether you realise it or not you have probably already encountered magnetostriction at some point in your life. The characteristic ‘transformer hum‘ is...
The post Take the Strain – Joule Magnetostriction appeared first on Spin and Tonic.
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Joule J.P. (1847) XVII. On the effects of magnetism upon the dimensions of iron and steel bars . Philosophical Magazine Series 3, 30(199), 76-87. DOI: http://dx.doi.org/10.1080/14786444708645656
Roy Kuntal, & Jayasimha Atulasimha. (2011) Hybrid spintronics and straintronics: A magnetic technology for ultra low energy computing and signal processing. Applied Physics Letters, 99(6), 63108. DOI: http://dx.doi.org/10.1063/1.3624900
Few of us will be surprised to hear that the academic job market is hugely competitive. What is surprising is how this paper uses techniques...
The post How Reproductive is Your Professor? appeared first on Spin and Tonic.
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Larson Richard C., & Yi Xue. (2013) Too Many PhD Graduates or Too Few Academic Job Openings: The Basic Reproductive Number R 0 in Academia . Systems Research and Behavioral Science, 31(6), 745-750. DOI: http://dx.doi.org/10.1002/sres.2210
Is it possible to hide in plain sight? Star Trek had cloaking devices, and Harry Potter and Frodo Baggins had their magic cloaks. In real life, we can make things disappear too. Cloaking devices are quickly becoming reality, and we bend light to make them work.... Read more »
Soric, J., Chen, P., Kerkhoff, A., Rainwater, D., Melin, K., & Alù, A. (2013) Demonstration of an ultralow profile cloak for scattering suppression of a finite-length rod in free space. New Journal of Physics, 15(3), 33037. DOI: 10.1088/1367-2630/15/3/033037
Maxwell’s Equations Maxwell’s equations, just like spintronics itself, involve understanding and combining electricity and magnetism. Unsurprisingly then, Maxwell’s equations come up in spintronics research time...
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Droughts have been severe in California and surrounding states, but will they be any worse than previous droughts in Earth's history? A combination of climate models and tree ring analysis provides an answer.... Read more »
Benjamin I. Cook, Toby R. Ault, Jason E. Smerdon. (2015) Unprecedented 21st century drought risk in the American Southwest and Central Plains. Science Advances. info:/
How sure is the future of spintronics? In field of spintronics, we can often be very sure of ourselves about what role we play in...
The post What Place for Spintronics in the Future of Computing? appeared first on Spin and Tonic.
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Many countries are adding biofuels to their mandates for carbon-free, renewable energy? But does biofuel truly fit the bill? Not so much, contrary to what popular culture hopes to believe. Find out the details here.... Read more »
Horita, M., Kitamoto, H., Kawaide, T., Tachibana, Y., & Shinozaki, Y. (2015) On-farm solid state simultaneous saccharification and fermentation of whole crop forage rice in wrapped round bale for ethanol production. Biotechnology for Biofuels, 8(1). DOI: 10.1186/s13068-014-0192-9
Star Trek’s 50th anniversary is next year. Wouldn’t transporting a person to the ISS be a great way to celebrate? Well, there are a couple of problems to overcome, but we’re on our way. We have recently learned how to transport information and light from one place to another, without it ever existing anywhere in between! And this will help us make quantum computers that will be able to transport all the information contained in every atom of your body.... Read more »
Filippov, S., & Ziman, M. (2014) Entanglement sensitivity to signal attenuation and amplification. Physical Review A, 90(1). DOI: 10.1103/PhysRevA.90.010301
Ma, X., Herbst, T., Scheidl, T., Wang, D., Kropatschek, S., Naylor, W., Wittmann, B., Mech, A., Kofler, J., Anisimova, E.... (2012) Quantum teleportation over 143 kilometres using active feed-forward. Nature, 489(7415), 269-273. DOI: 10.1038/nature11472
Shomroni, I., Rosenblum, S., Lovsky, Y., Bechler, O., Guendelman, G., & Dayan, B. (2014) All-optical routing of single photons by a one-atom switch controlled by a single photon. Science, 345(6199), 903-906. DOI: 10.1126/science.1254699
Yokoyama, S., Ukai, R., Armstrong, S., Sornphiphatphong, C., Kaji, T., Suzuki, S., Yoshikawa, J., Yonezawa, H., Menicucci, N., & Furusawa, A. (2013) Ultra-large-scale continuous-variable cluster states multiplexed in the time domain. Nature Photonics, 7(12), 982-986. DOI: 10.1038/nphoton.2013.287
William Thomson – The Father of Spintronics? This paper from 1856 helped trigger the entire field of spintronics – but you’d be forgiven for not...
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Thomson W. (1856) On the Electro-Dynamic Qualities of Metals:--Effects of Magnetization on the Electric Conductivity of Nickel and of Iron. Proceedings of the Royal Society of London, 546-550. DOI: http://dx.doi.org/10.1098/rspl.1856.0144
Happy valentines day! Okay maybe it’s turned into more of a reason to spend money on chocolate and flowers than it is about showing affection — which is probably why some people hate it — but it can still be a somewhat special day. Unfortunately I’ve been struggling on what I could do for my wife on valentines day. So I thought I would work it out here and maybe even help a few of you who are stuck as well.... Read more »
Drefahl, S. (2012) Do the Married Really Live Longer? The Role of Cohabitation and Socioeconomic Status. Journal of Marriage and Family, 74(3), 462-475. DOI: 10.1111/j.1741-3737.2012.00968.x
Aron, A. (2005) Reward, Motivation, and Emotion Systems Associated With Early-Stage Intense Romantic Love. Journal of Neurophysiology, 94(1), 327-337. DOI: 10.1152/jn.00838.2004
Carey, I., Shah, S., DeWilde, S., Harris, T., Victor, C., & Cook, D. (2014) Increased Risk of Acute Cardiovascular Events After Partner Bereavement. JAMA Internal Medicine, 174(4), 598. DOI: 10.1001/jamainternmed.2013.14558
There is a saying that life imitates art and while people like to disagree with the meaning of it, sometimes art can imitate life. For instance the team responsible for the Oscar-nominated visual effects at the centre of Interstellar, have turned science fiction into science fact by providing new insights into the powerful effects of black holes.... Read more »
Oliver James, Eugenie von Tunzelmann, Paul Franklin, & Kip S. Thorne. (2015) Gravitational Lensing by Spinning Black Holes in Astrophysics, and in the Movie Interstellar. Classical and Quantum Gravity. arXiv: 1502.03808v1
As Star Trek’s 50th anniversary approaches, are we getting closer to traveling at light speed? Believe it or not – yes, we are. We have begun to understand and harness the power of antimatter, and the plasma bubble-driven warp drive has moved from silly idea to serious consideration – so much so that NASA has designed a warp drive ship, the IXS Enterprise, of course.... Read more »
S. Beghella-Bartoli, P.M. Bhujbal, A. Nas. (2015) Confirmation of Santilli's detection of antimatter galaxies via a telescope with concave lens. America Journal of Modern Physics, 4(1), 34. info:/
Alcubierre, M. (1994) The warp drive: hyper-fast travel within general relativity. Classical and Quantum Gravity, 11(5). DOI: 10.1088/0264-9381/11/5/001
Ganiev, Y., Gordeev, V., Krasilnikov, A., Lagutin, V., Otmennikov, V., & Panasenko, A. (2000) Aerodynamic Drag Reduction by Plasma and Hot-Gas Injection. Journal of Thermophysics and Heat Transfer, 14(1), 10-17. DOI: 10.2514/2.6504
Ronan Keane, & Wei-Ming Zhang. (2012) Beamed Core Antimatter Propulsion: Engine Design and Optimization. J.Br.Interplanet.Soc. arXiv: 1205.2281v2
My second guest post at the Eyes on Environment blog at Nature's Scitable network. Check out how policy and technology will help integrate renewables into the electrical grid.... Read more »
Kucharski, T., Ferralis, N., Kolpak, A., Zheng, J., Nocera, D., & Grossman, J. (2014) Templated assembly of photoswitches significantly increases the energy-storage capacity of solar thermal fuels. Nature Chemistry, 6(5), 441-447. DOI: 10.1038/nchem.1918
New analysis in Nature shows that differences in actual and modeled temperature trends are due to natural variability in Earth's climate over short timescales. Read the details here!... Read more »
Marotzke J, & Forster PM. (2015) Forcing, feedback and internal variability in global temperature trends. Nature, 517(7536), 565-70. PMID: 25631444
FeRh is a metallic alloy that has been well investigated over the past 70 years or so, yet a thorough understanding of some of its...
The post FeRh: Making the transition to a well-understood potential spintronic material appeared first on Spin and Tonic.
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Kudrnovský, J., Drchal, V., & Turek, I. (2015) Physical properties of FeRh alloys: The antiferromagnetic to ferromagnetic transition. Physical Review B, 91(1). DOI: 10.1103/PhysRevB.91.014435
The quintessential feature of a black hole is its “point of no return,” or what is more technically called its event horizon, yes just like the movie. When anything—a star, a particle, or wayward human—crosses this horizon, the black hole’s massive gravity pulls it in with such force that it is impossible to escape. At least, this is what happens in traditional black hole models based on general relativity. In general, the existence of this event horizon is responsible for most of the ........ Read more »
Ali, A., Faizal, M., & Majumder, B. (2015) Absence of an effective Horizon for black holes in Gravity's Rainbow. EPL (Europhysics Letters), 109(2), 20001. DOI: 10.1209/0295-5075/109/20001
Amelino-Camelia, G. (2002) Relativity in space-times with short-distance structure governed by an observer-independent (Planckian) length scale. International Journal of Modern Physics D, 11(01), 35-59. DOI: 10.1142/S0218271802001330
Freidel, L., & Livine, E. (2006) 3D Quantum Gravity and Effective Noncommutative Quantum Field Theory. Physical Review Letters, 96(22). DOI: 10.1103/PhysRevLett.96.221301
Data suggests that marine life may soon follow the mass extinctions seen in terrestrial ecosystems - similarities and differences discussed here!... Read more »
McCauley, D., Pinsky, M., Palumbi, S., Estes, J., Joyce, F., & Warner, R. (2015) Marine defaunation: Animal loss in the global ocean. Science, 347(6219), 1255641-1255641. DOI: 10.1126/science.1255641
This Week’s Pick of the Past article took a retrospective look at the excitement that magnetic bubble memory caused in the 1970s. The basic principle...
The post Magnetic domains get a DUI for driving under the influence of DMI appeared first on Spin and Tonic.
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Petit, D., Seem, P., Tillette, M., Mansell, R., & Cowburn, R. (2015) Two-dimensional control of field-driven magnetic bubble movement using Dzyaloshinskii–Moriya interactions. Applied Physics Letters, 106(2), 22402. DOI: 10.1063/1.4905600
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