Labyrinthine Magnetic Domains in films

Nucleation and avalanches in films with labyrinthine magnetic domains.
A. Benassi, S. Zapperi
ArXiv 1111.3140 (2011)

Hysteresis loops for di erent dipolar interaction strength. The inset sketches our model ferromagnetic thin lm. Panels (a-h) lm magnetization m(x; y) for di fferent external field values along the hysteresis loop.

Magnetic capsules for NMR

Magnetic Capsules for NMR Imaging: Effect of Magnetic Nanoparticles Spatial Distribution and Aggregation.
Azhar Zahoor Abbasi, Lucía Gutierrez, Loretta L. del Mercato, Fernando Herranz, Oksana Chubykalo-Fesenko, Sabino Veintemillas-Verdaguer, Wolfgang J. Parak,M Puerto Morales, Jesus M Gonzalez, Antonio Hernando, and Patricia de la Presa
J. Phys. Chem. C 115, 6257 (2011)

Protein corona in NPs

Hardening of the Nanoparticle–Protein Corona in Metal (Au, Ag) and Oxide (Fe 3 O 4 , CoO, and CeO 2 ) Nanoparticles.
Eudald Casals , Tobias Pfaller , Albert Duschl , Gertie J. Oostingh ,and Víctor F. Puntes
Small 7, 3479 (2011)

NP–protein interactions. The process of conjugation of the NP when inserted in biological media takes few minutes in the working conditions (I), which evolves to a NP coated with protein in equilibrium with the proteins in the medium (II), then later evolves towards an irreversible protein corona with proteins that are no longer in equilibrium with
their in-solution counterparts (III).

Biotemplated NP Arrays

Biotemplated Magnetic Nanoparticle Arrays.
Johanna M. Galloway , Jonathan P. Bramble , Andrea E. Rawlings , Gavin Burnell, Stephen D. Evans, and Sarah S. Staniland
Small 8, 204 (2011)

Immobilized biomineralizing protein Mms6 templates the formation of uniform magnetite nanoparticles in situ when selectively patterned onto a surface. Magnetic force microscopy shows that the stable magnetite particles maintain their magnetic orientation at room temperature, and may be exchange coupled. This precision-mixed biomimetic/soft-lithography methodology offers great potential for the future of nanodevice fabrication.

Proximity effects in topological insulators

Magnetic Proximity Effect as a Pathway to Spintronic Applications of Topological Insulators.
Ivana Vobornik,Unnikrishnan Manju, Jun Fujii, Francesco Borgatti, Piero Torelli, Damjan Krizmancic, Yew San Hor, Robert J. Cava, and Giancarlo Panaccione
Nano Letters 11, 4079 (2011)

Mn and Fe XMCD hysteresis loops vs temperature for Fe (black) and Mn (red).

Sailing plasmonic NP

Plasmonic Nanoparticle Chain in a Light Field: A Resonant Optical Sail.
Silvia Albaladejo, Juan José Sáenz, and Manuel I. Marqués
Nano Lett 11, 4597 (2011)

We propose to use a chain made of metallic nanoparticles as a resonant light sail, attached by one end point to a transparent object and propelling it by the use of electromagnetic radiation.

Plasmonic nanoclusters by DNA

DNA-Enabled Self-Assembly of Plasmonic Nanoclusters.
Jonathan A. Fan, Yu He, Kui Bao, Chihhui Wu, Jiming Bao, Nicholas B. Schade, Vinothan N. Manoharan, Gennady Shvets, Peter Nordlander, David R. Liu, and Federico Capasso
Nano Letters 11, 4859 (2011)

DNA-mediated assembly of plasmonic heterotetramers.

Gold NPs for medicine

Gold Nanoparticles: A Revival in Precious Metal Administration to Patients.
A. S. Thakor, J. Jokerst, C. Zavaleta, T. F. Massoud, and S. S. Gambhir
Nano Letters 11, 4029 (2011)

Suppression of thermal stability by rotating field.

Resonant suppression of thermal stability of the nanoparticle magnetization by a rotating magnetic field.
S. I. Denisov, A. Yu. Polyakov, and T. V. Lyutyy
Phys. Rev. B 84, 174410 (2011)

Diagram of the precessional modes for σρ = +1. The regions in the h-ω plane where different P modes exist
at σρ = +1 are denoted as P+1 (white) and P +1 (light-green). The Q mode is realized in the white shaded region.

Ultrafast magnetization dynamics: theory Review + article

Electron theory of fast and ultrafast dissipative magnetization dynamics.
M. Fähnle and C. Illg
JPCM, 23 493201 (2011)

Frustrated magnet at ultrahigh fields

Magnetic Phases of a Highly Frustrated Magnet, ZnCr2O4, up to an Ultrahigh Magnetic Field of 600 T.
Atsuhiko Miyata, Hiroaki Ueda, Yutaka Ueda, Hironobu Sawabe, and Shojiro Takeyama
Phys. Rev. Lett. 107, 207203 (2011)

Magnetic phase diagram . Cross symbols indicate transition points observed by the Faraday rotation method.
Broken lines show anomalies appeared in the magneto-optical absorption.

EB in FeO NPs

Exchange bias in iron oxide nanoclusters.
Jorge Sánchez-Marcos, M Ángeles Laguna-Marco, Rocío Martínez-Morillas, Eva Céspedes, Félix Jiménez-Villacorta, Nieves Menéndez and Carlos Prieto
JPCM 23, 476003 (2011)

Loops of TAD.n-FeOx//CU10 sample at different temperatures between 2 and 100 K. Inset: temperature evolution of coercive and EB fields.

Magnetic Friction

Magnetic friction: From Stokes to Coulomb behavior.
Martin P. Magiera, Sebastian Angst, Alfred Hucht, and Dietrich E. Wolf
Phys. Rev. B 84, 212301 (2011)

Magnetic NPs: Two Reviews

Magnetic nanoparticles: recent advances in synthesis, self-assembly and applications.
Srikanth Singamaneni, Valery N. Bliznyuk, Christian Binek and Evgeny Y. Tsymbal
J. Mater. Chem. 21, 16819 (2011)

PEEM imageing of reversal in core/shell nwires

Photoemission electron microscopy of three-dimensional magnetization configurations in core-shell nanostructures.
Judith Kimling, Florian Kronast, Stephan Martens, Tim Böhnert, Michael Martens, Julia Herrero-Albillos, Logane Tati-Bismaths, Ulrich Merkt, Kornelius Nielsch, and Guido Meier
Phys. Rev. B 84, 174406 (2011)

(a) PEEM images of the core-shell wire recorded at the iron L3 edge and the nickel L3 edge (background extracted).
(b)–(e) Differential XMCD images of the iron oxide tube (left) and the nickel core (right) recorded at the respective absorption edges.

MagnetoCoulomb effects in NPs

Magneto-Coulomb Effect in Carbon Nanotube Quantum Dots Filled with Magnetic Nanoparticles.
S. Datta, L. Marty, J. P. Cleuziou, C. Tilmaciu, B. Soula, E. Flahaut, and W. Wernsdorfer
Phys. Rev. Lett. 107, 186804 (2011)

(a) High resolution TEM of a portion of an individual DWCNT, filled inside its inner shell with elongated nanoparticles.
(b) Schematic representation of the device. (c) Lock-in gate modulation of the device at 40 mK with zero source-drain
bias (Vsd= 0).

TMR modulation in single nanoislands

Spatially Modulated Tunnel Magnetoresistance on the Nanoscale.
Hirofumi Oka, Kun Tao, Sebastian Wedekind, Guillemin Rodary, Valeri S. Stepanyuk, Dirk Sander, and Jü rgen Kirschner
Phys. Rev. Lett. 107, 187201 (2011)

Maps of the TMR ratio obtained at the indicated voltages(e)–(g) Line profiles, averaged over 6
adjacent lines for an improved signal-to-noise ratio, of the TMR ratio images along the yellow arrows in (b)–(d).

Spin wave transport in a domain wall

All-Magnonic Spin-Transfer Torque and Domain Wall Propagation.
P. Yan, X. S. Wang, and X. R. Wang
Phys. Rev. Lett. 107, 177207 (2011)

Illustration of a transverse DW structure whose m is denoted by the (blue) arrows.

Magnetite film crystals

Magnetism in nanometer-thick magnetite.
Matteo Monti, Benito Santos, Arantzazu Mascaraque, Oscar Rodríguez de la Fuente, Miguel Angel Niño,Tevik Onur Mentes¸, Andrea Locatelli, Kevin F. McCarty, José F. Marco, and Juan de la Figuera
Phys. Rev. B 85, 020404(R) (2012)

Selected LEEM images from a sequence acquired during the growth of the magnetite crystals. The first three frames
show the completion of the FeO layer, while the last frame shows the final film with magnetite crystals.

Magnetic Coulomb phase in spin ice

Analysis of a Fully Packed Loop Model Arising in a Magnetic Coulomb Phase.
L. D. C. Jaubert, M. Haque, and R. Moessner
Phys. Rev. Lett. 107, 177202 (2011)

Left: Loops of two colors, blue (red) for up (down) spins, and a worm (dashed green, made of alternating up and down spins), on the checkerboard lattice. Right: Spin ice model on the pyrochlore lattice with in (blue) and out (red) spins.

Molecular Magnets on FM substrates

Coupling Single Molecule Magnets to Ferromagnetic Substrates.
A. Lodi Rizzini, C. Krull, T. Balashov, J. J. Kavich, A. Mugarza, P. S. Miedema, P. K. Thakur, V. Sessi, S. Klyatskaya, M. Ruben, S. Stepanow, and P. Gambardella
Phys. Rev. Lett. 107, 177205 (2011)

Element-resolved hysteresis loops of Ni (top) and Tb (bottom) for (a) TbPc2=Ni=Cuð100Þ,
(b) TbPc2=O=Ni=Cuð100Þ, (c) TbPc2=Li=Ni=Cuð100Þ, and (d) TbPc2=Ni=Agð100Þ measured at normal (left) and grazing
(right) incidence at T ¼ 8 K.

Electric control of magnetism at room T

Electrical control of the ferromagnetic phase transition in cobalt at room temperature.
D. Chiba, S. Fukami, K. Shimamura, N. Ishiwata, K. Kobayashi and T. Ono
Nature Mater. 10, 853 (2011)

Switching of ferromagnetism by electric field at room temperature and measurement configuration. a, Ferromagnetic phase transition of a metal ferromagnet of Cobalt (Co) was induced by applying a gate voltage (VG) at room temperature. The device for the transport measurements consists of a metal gate (Au=Cr), an insulator layer (HfO2), and an ultrathin Co layer. b, Measurement configuration with Hall-bar-shaped device. Anomalous Hall resistance (RHall) measured with a
d.c. current I of 20 A was used to measure the local magnetization of the ultrathin Co layer under the applications of the gate voltage (VG).

Magnetic materials form block copolymers

Room temperature magnetic materials from nanostructured diblock copolymers.
Zoha M. AL-Badri, Raghavendra R. Maddikeri, Yongping Zha, Hitesh D. Thaker, Priyanka Dobriyal, Raja Shunmugam, Thomas P. Russell & Gregory N. Tew
Nature Comms. 2, 1485 (2011)

Magnetic characterization of the BCP and homopolymer. The room temperature response of the thermally annealed (a) BCP and (b) homopolymer to a permanent magnet.

Dynamics of a magnetic dimer

Dynamics of a magnetic dimer with exchange, dipolar, and Dzyalozhinski-Moriya interaction.
A. F. Franco, J. M. Martinez, J. L. Déjardin, and H. Kachkachi
Phys. Rev. B 84, 134423 (2011)

Evolution of the energy potential surface of a DDI-MD with longitudinal anisotropy configuration as ξ increases,
with σ = 1.5.

Disorder in artificial spin ice

Reducing Disorder in Artificial Kagome Ice.
Stephen A. Daunheimer, Olga Petrova, Oleg Tchernyshyov, and John Cumings
Phys. Rev. Lett. 107, 167201 (2011)