physica status solidi (a)

Cover image for Vol. 210 Issue 7

July 2013

Volume 210, Issue 7

Pages 1237–1460

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Issue Information
    5. Contents
    6. Recent and forthcoming publications in pss
    7. Preface
    8. Review Articles
    9. Feature Articles
    10. Original Papers
    11. Information for authors
    1. You have free access to this content
      L10 FePtX–Y media for heat-assisted magnetic recording (Phys. Status Solidi A 7∕2013)

      Dieter Weller, Oleksandr Mosendz, Gregory Parker, Simone Pisana and Tiffany S. Santos

      Article first published online: 19 JUL 2013 | DOI: 10.1002/pssa.201370040

      Thumbnail image of graphical abstract

      Heat-assisted magnetic recording (HAMR) is a new technology that will increase the achievable areal density in magnetic hard disk drives. In order to write bits into HAMR media, a laser locally heats beyond the Curie temperature and rapid cooling in the presence of the head field produces transitions in the magnetic orientation. Chemically ordered FePt exhibiting high magnetic anisotropy, will be used for the new thermally stable recording media. As discussed in the Review Article by D. Weller et al. (pp. 1245–1260), HAMR media are optimized by growing granular L10 FePt on a relatively thin thermal resistor seed layer on top of a thicker thermal conductor or heatsink layer. In addition soft underlayers are suggested to optimize the magnitude and angle of the magnetic write field. The achievable areal density depends on the near-field transducer dimension and the thermal conductivity of the media. Besides grain size, shape and distribution requirements, the thermal properties of both the magnetic and the seed layers need to be improved and optimized to achieve the required signal-to-noise ratio for higher areal densities in future magnetic recording, which will be in the range of 1.5-5 Tb∕in2.

  2. Back Cover

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Issue Information
    5. Contents
    6. Recent and forthcoming publications in pss
    7. Preface
    8. Review Articles
    9. Feature Articles
    10. Original Papers
    11. Information for authors
    1. You have free access to this content
      Characterisation of FePt nanomagnets by X-ray absorption spectroscopy (Phys. Status Solidi A 7∕2013)

      Carolin Schmitz-Antoniak

      Article first published online: 19 JUL 2013 | DOI: 10.1002/pssa.201370041

      Thumbnail image of graphical abstract

      In the last decade FePt nanoparticles gained a lot of interest due to their potential use in ultra-high density storage media. In the article by C. Schmitz-Antoniak (pp. 1298–1304), the X-ray absorption spectroscopy is presented as a powerful tool to characterise the properties of ensembles of FePt nanoparticles. In particular, spin and orbital magnetic moments obtained from the X-ray magnetic circular dichroism are correlated to crystallographic structure and local composition investigated by the analysis of the extended X-ray absorption fine structure (EXAFS). The image on the cover shows on the vertical axis the magnitude of the wavelet transform of EXAFS oscillations obtained at the Pt L3 absorption edge of 6 nm FePt nanoparticles in the as-prepared state, i.e. including oxygen and carbon contaminations. It is shown as a function of photoelectron wave number and radial distance. The peaks at different positions can be assigned to different elements.

  3. Issue Information

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Issue Information
    5. Contents
    6. Recent and forthcoming publications in pss
    7. Preface
    8. Review Articles
    9. Feature Articles
    10. Original Papers
    11. Information for authors
    1. You have free access to this content
      Issue Information

      Article first published online: 19 JUL 2013 | DOI: 10.1002/pssa.201370042

  4. Contents

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Issue Information
    5. Contents
    6. Recent and forthcoming publications in pss
    7. Preface
    8. Review Articles
    9. Feature Articles
    10. Original Papers
    11. Information for authors
    1. You have free access to this content
      Contents (pages 1237–1242)

      Article first published online: 19 JUL 2013 | DOI: 10.1002/pssa.201370043

  5. Recent and forthcoming publications in pss

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Issue Information
    5. Contents
    6. Recent and forthcoming publications in pss
    7. Preface
    8. Review Articles
    9. Feature Articles
    10. Original Papers
    11. Information for authors
    1. You have free access to this content
  6. Preface

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Issue Information
    5. Contents
    6. Recent and forthcoming publications in pss
    7. Preface
    8. Review Articles
    9. Feature Articles
    10. Original Papers
    11. Information for authors
    1. Terabit recording and magnetic nanostructures

      You have free access to this content
  7. Review Articles

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Issue Information
    5. Contents
    6. Recent and forthcoming publications in pss
    7. Preface
    8. Review Articles
    9. Feature Articles
    10. Original Papers
    11. Information for authors
    1. Terabit recording and magnetic nanostructures

      You have free access to this content
      L10 FePtX–Y media for heat-assisted magnetic recording (pages 1245–1260)

      Dieter Weller, Oleksandr Mosendz, Gregory Parker, Simone Pisana and Tiffany S. Santos

      Article first published online: 24 MAY 2013 | DOI: 10.1002/pssa.201329106

      Thumbnail image of graphical abstract

      This Review Article discusses highly chemically ordered L10 FePtX-Y nano-granular films with high perpendicular magnetic anisotropy as key media approaches for future heat-assisted magnetic recording. They are sputter-deposited at about 600 °C and grown on well oriented MgO(002) texture layers. X = Ag and Cu reduce the deposition and Curie temperature. Y = carbon or other segregants are used to optimize grain size, shape and dispersion, which together with thermal conductivity are critical to extend the areal density in future magnetic recording to 1.5-5 Tb∕in2.

  8. Feature Articles

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Issue Information
    5. Contents
    6. Recent and forthcoming publications in pss
    7. Preface
    8. Review Articles
    9. Feature Articles
    10. Original Papers
    11. Information for authors
    1. Terabit recording and magnetic nanostructures

      Large-area hard magnetic L10-FePt and composite L10-FePt based nanopatterns (pages 1261–1271)

      Dagmar Goll and Thomas Bublat

      Article first published online: 14 JUN 2013 | DOI: 10.1002/pssa.201329017

      Thumbnail image of graphical abstract

      Large-area hard magnetic L10-FePt based granular and bit-patterned media are fabricated and characterized. Within the framework of micromagnetism the magnetic reversal mechanism of different types of nanodots is analyzed from the temperature and angular dependences of the switching field. Such media are very promising to realize magnetic storage densities of 1 Tbits∕in2 and far beyond.

    2. Rapid thermal annealing of FePt thin films (pages 1272–1281)

      Manfred Albrecht and Christoph Brombacher

      Article first published online: 22 APR 2013 | DOI: 10.1002/pssa.201228718

      Thumbnail image of graphical abstract

      This Feature Article presents the state-of-the-art concerning the formation of chemically L10 ordered FePt thin films induced by rapid thermal annealing (RTA). The influence of the annealing temperature, annealing time, and film thickness on the ordering transformation and (001) texture evolution of the FePt thin films is studied and the possible mechanisms for the formation are discussed. In this regard, RTA processing is a potentially interesting technology for the preparation of FePt thin films with strong perpendicular magnetic anisotropy, important for future magnetic storage devices.

    3. Trends in spin and orbital magnetism of free and encapsulated FePt nanoparticles (pages 1282–1297)

      Markus Ernst Gruner

      Article first published online: 4 JUN 2013 | DOI: 10.1002/pssa.201329048

      Thumbnail image of graphical abstract

      Large-scale first principles calculations in the framework of density functional theory offer detailed insight into the close interrelation between particle composition, morphology and magnetism with electronic resolution. Exploiting the power of contemporary supercomputers, one can identify systematic trends in spin and orbital magnetism of nanometer-sized hard magnetic particles related to their structure or chemical environment. This Feature Article concentrates on Fe-Pt nanoparticles, which are considered as promising candidates for ultra-high density recording media. Special emphasis is made on the role of the surfaces and the impact of a protective encapsulation with Cu, Au, Al or further main group elements on the hard magnetic properties. The anisotropy of the orbital moments turns out to be a valuable quantity characterizing the particular contribution of surfaces and interfaces on the atomic scale.

    4. Characterisation of FePt nanomagnets by X-ray absorption spectroscopy (pages 1298–1304)

      Carolin Schmitz-Antoniak

      Article first published online: 3 JUL 2013 | DOI: 10.1002/pssa.201329134

      Thumbnail image of graphical abstract

      X-ray absorption spectroscopy is presented as a powerful tool to characterise nanoscale systems regarding their structural and magnetic properties. In particular, the extended X-ray absorption fine structure has been employed and analysed by standard Fourier based analysis and using wavelet transforms. The latter can be used to directly visualise contributions to the fine structure from different atomic species in the local environment of the absorbing atoms with a high resolution in both real space and reciprocal space. In addition, spin and orbital magnetic moments have been determined by X-ray magnetic circular dichroism to investigate the local structure around Fe and Pt atoms and of the two atomic species, respectively. The detailed atomistic picture deduced from experimental results on FePt nanoparticles was compared to recent calculations within the density functional theory that gave the possibility to state design rules for the preparation of nanoparticles with desired magnetic properties. In this review, a short survey about these findings is given focusing on the experimental work.

  9. Original Papers

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Issue Information
    5. Contents
    6. Recent and forthcoming publications in pss
    7. Preface
    8. Review Articles
    9. Feature Articles
    10. Original Papers
    11. Information for authors
    1. Terabit recording and magnetic nanostructures

      Fabrication and high-resolution electron microscopy study of FePt L10/A1 graded exchange spring media (pages 1305–1310)

      Jehyun Lee, Barbara Dymerska, Josef Fidler, Vasilis Alexandrakis, Thanassis Speliotis, Dimitris Niarchos, Peter Pongratz and Dieter Suess

      Article first published online: 22 APR 2013 | DOI: 10.1002/pssa.201228731

    2. Contacting metallic nanoparticles on transparent substrates (pages 1311–1315)

      A. Erbe, U. Wiesenhütter, J. Grebing and J. Fassbender

      Article first published online: 24 JUN 2013 | DOI: 10.1002/pssa.201228769

    3. Ternary and multinary compounds

      First-principles calculations of diffusion of constituent atoms in CuGaSe2 (pages 1317–1321)

      Satoshi Nakamura, Tsuyoshi Maeda and Takahiro Wada

      Article first published online: 2 JUL 2013 | DOI: 10.1002/pssa.201200860

    4. Growth and characterization of Cu2ZnSnS4 single crystals (pages 1328–1331)

      Akira Nagaoka, Kenji Yoshino, Hiroki Taniguchi, Tomoyasu Taniyama, Koichi Kakimoto and Hideto Miyake

      Article first published online: 24 MAY 2013 | DOI: 10.1002/pssa.201200815

    5. Magnetotransport properties of MnAs/ZnSnAs2/ZnSnAs2:Mn ferromagnet/semiconductor hybrid structures (pages 1336–1339)

      Hiroto Oomae, Yoshio Jinbo, Hideyuki Toyota and Naotaka Uchitomi

      Article first published online: 29 MAY 2013 | DOI: 10.1002/pssa.201200829

    6. Regular contributions

    7. Flexible organic field-effect transistor fabricated by thermal press process (pages 1353–1357)

      Atsuo Inoue, Tatsuyoshi Okamoto, Masatoshi Sakai, Shigekazu Kuniyoshi, Hiroshi Yamauchi, Masakazu Nakamura and Kazuhiro Kudo

      Article first published online: 20 MAR 2013 | DOI: 10.1002/pssa.201228776

    8. Polarization doping for III-nitride optoelectronics (pages 1369–1376)

      Oleg V. Khokhlev, Kirill A. Bulashevich and Sergey Yu. Karpov

      Article first published online: 18 MAR 2013 | DOI: 10.1002/pssa.201228614

    9. Electrical characteristics of HfO2 films on InP with different atomic-layer-deposition temperatures (pages 1381–1385)

      Chee-Hong An, Chandreswar Mahata, Young-Chul Byun, Myung Soo Lee, Yu Seon Kang, Mann-Ho Cho and Hyoungsub Kim

      Article first published online: 20 MAR 2013 | DOI: 10.1002/pssa.201228759

    10. Design of p-CuO/n-ZnO heterojunctions by rf magnetron sputtering (pages 1386–1391)

      Kachirayil J. Saji, Sascha Populoh, Ayodhya N. Tiwari and Yaroslav E. Romanyuk

      Article first published online: 20 MAR 2013 | DOI: 10.1002/pssa.201228293

    11. The effect of Al2O3 additive on the microstructure and magnetic properties of Co75Cr13Pt12/Cr thin films (pages 1400–1406)

      Mohammad Almasi-Kashi, Elham Jafari-Khamse, Abdolali Ramazani and Hamidreza Almasi-Kashi

      Article first published online: 10 APR 2013 | DOI: 10.1002/pssa.201228795

    12. The self-compatibility effect in graded thermoelectric cooler elements (pages 1407–1417)

      Wolfgang Seifert, G. Jeffrey Snyder, Eric S. Toberer, Christophe Goupil, Knud Zabrocki and Eckhard Müller

      Article first published online: 10 APR 2013 | DOI: 10.1002/pssa.201228741

    13. Nanoscale light guiding in a silicon-based hybrid plasmonic waveguide that incorporates an inverse metal ridge (pages 1424–1428)

      Yusheng Bian, Zheng Zheng, Xin Zhao, Lei Liu, Yalin Su, Jiansheng Liu, Jinsong Zhu and Tao Zhou

      Article first published online: 3 APR 2013 | DOI: 10.1002/pssa.201228682

    14. Growth of silicon nanowires by sputtering and evaporation methods (pages 1429–1432)

      Thuy Thi Nguyen, Anh Xuan Vuong, Luan Duc Mai, Tuan Hoang Nguyen, Tu Nguyen, Chien Duc Nguyen and Lam Huu Nguyen

      Article first published online: 3 APR 2013 | DOI: 10.1002/pssa.201228730

    15. Deep red phosphors SrAl12O19:Mn4+,M (M = Li+, Na+, K+, Mg2+) for high colour rendering white LEDs (pages 1433–1437)

      Lei Wang, Yudong Xu, Di Wang, Rulong Zhou, Ning Ding, Min Shi, Yiqing Chen, Yang Jiang and Yuhua Wang

      Article first published online: 3 APR 2013 | DOI: 10.1002/pssa.201228815

    16. Proton irradiation effects on thermal transport in individual single-crystalline Bi nanowires (pages 1438–1441)

      Jong Wook Roh, Dai Ho Ko, Joohoon Kang, Min Kyung Lee, Joo Hee Lee, Cheol Woo Lee, Kyu Hyoung Lee, Jin-Seo Noh and Wooyoung Lee

      Article first published online: 10 APR 2013 | DOI: 10.1002/pssa.201228734

    17. Multiferroic and optical properties of Pr-substituted bismuth ferrite ceramics (pages 1442–1447)

      Vikash Singh, Subhash Sharma, R. K. Dwivedi, Manoj Kumar and R. K. Kotnala

      Article first published online: 15 APR 2013 | DOI: 10.1002/pssa.201228612

    18. Morphological dependence of hydrothermally synthesized ZnO nanowires on synthesis temperature and molar concentration (pages 1448–1453)

      Koang Ouk Choi, Sang Hyun Yoon, Won-Seok Kim, Kyu-Ha Lee, Cheol-Min Yang, Jong Hun Han, Chi Jung Kang, Young Jin Choi and Tae-Sik Yoon

      Article first published online: 10 APR 2013 | DOI: 10.1002/pssa.201329003

    19. Terahertz transmission and effective gain measurement of two-dimensional electron gas (pages 1454–1458)

      R. Sharma, T. Laurent, J. Torres, P. Nouvel, S. Blin, L. Varani, Y. Cordier, M. Chmielowska, J.-P. Faurie and B. Beaumont

      Article first published online: 24 APR 2013 | DOI: 10.1002/pssa.201228869

  10. Information for authors

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Issue Information
    5. Contents
    6. Recent and forthcoming publications in pss
    7. Preface
    8. Review Articles
    9. Feature Articles
    10. Original Papers
    11. Information for authors
    1. You have free access to this content
      Information for authors (pages 1459–1460)

      Article first published online: 19 JUL 2013 | DOI: 10.1002/pssa.201370046

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